Lion conservation requires effective international cooperation

Lions belong to the world’s most charismatic megafauna. However, lion numbers and range have declined alarmingly over the last two decades.

“To turn the tide, international cooperation is crucial,” says a team of lawyers, conservation biologists and social scientists.

In their recently published review article in the journal Nature Conservation, they assess the current and potential future role of international treaties regarding lion conservation.

Kruger 1To conduct this study, international wildlife lawyers Arie Trouwborst and Melissa Lewis from Tilburg Law School in the Netherlands teamed up with lion experts David Macdonald, Amy Dickman and other scientists from the University of Oxford‘s Wildlife Conservation Research Unit (WildCRU) – the research group that made Cecil the lion famous.

Their analysis clearly shows the importance of various global and regional treaties for lion conservation.

For instance, dozens of important lion areas have received international protection under treaties like the World Heritage Convention and the Ramsar Wetlands Convention, whereas trade in lion bones and hunting trophies is regulated through the Convention on International Trade in Endangered Species (CITES).

“There is still much room for improvement in the way the international commitments of lion range states are applied on the ground,” the review notes.

However, the authors conclude that it is worthwhile to invest in such improvements, and stress the importance of strategies involving the local people who live alongside lions. The review offers many concrete recommendations for optimising the contributions of the various treaties to lion conservation.

A particularly important recommendation is to formally list lions under the Convention on the Conservation of Migratory Species (CMS). A proposal to list lions is on the agenda of the next intergovernmental summit of the parties to the CMS in October this year.

As lead author Arie Trouwborst explains:

“Listing the lion would raise the profile of this iconic species, and would moreover enable the CMS to provide a framework for coordinating and assisting conservation efforts in the 25 countries where lions still occur in the wild.”Imfolozi 3

According to David Macdonald, Director of WildCRU:

“Biology is necessary, but not sufficient, to inform and deliver wildlife conservation. Our approach at the WildCRU in Oxford is holistic – this new partnership with international lawyers is a symbol of our determination to embrace knowledge from every discipline, leaving no stone unturned in our quest to conserve these iconic animals.”

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Original source:

Trouwborst A, Lewis M, Burnham D, Dickman A, Hinks A, Hodgetts T, Macdonald E, Macdonald D (2017) International law and lions (Panthera leo): understanding and improving the contribution of wildlife treaties to the conservation and sustainable use of an iconic carnivore. Nature Conservation 21: 83-128. https://doi.org/10.3897/natureconservation.21.13690

Nature Conservation Special: Guidelines for the monitoring of beetles protected in Europe

In a follow-up to a recent special issue, 8 research articles outline a set of verified guidelines for the monitoring of 5 saproxylic beetle species listed in the Habitats Directive

In a set of eight research publications, scientists tested various methods for the monitoring of five European saproxylic (i.e. dependent on dead wood) beetle species protected by the Habitats Directive. The aim of their work was to test and propose a standard method for each species. A key role in this conservation initiative was played by citizen scientists who made it possible for sufficient data to be collected within a significantly shorter time frame.

The special issue “Guidelines for the monitoring of the saproxylic beetles protected in Europe” is the second in succession published in the open access journal Nature Conservation. Both are produced within the framework of the European Union’s LIFE Programme Project “Monitoring of insects with public participation” (LIFE11 NAT/IT/000252 MIPP) and were presented at the European Workshop held in Mantova in May 2017. Colonel Franco Mason, project manager of the MIPP project, notes that the workshop was aimed primarily at monitoring of saproxylic beetles.

While the first article collection focused on reporting recent findings derived from monitoring surveys across the European Union, the papers in the latest issue are devoted to testing various methods for the monitoring of five selected species of protected beetles, in order to determine the most efficient methods and, subsequently, to propose them as standard methods.

12761_Public participation 2nd tweetCuriously, the public participation in the project was not limited to ecology and entomology semi-experts and aficionados. The team specifically targeted children when recruiting volunteers. One of the dissemination activities of the MIPP project was the “MIPP-iacciono gli insetti” (translated to “I like insects” from Italian), where 3000 students from primary to high school undertook 60 activities per year in order to learn how to locate and identify the target insects.

“Participation by children in environmental education programmes seems to have a great impact on their attitude and behaviour,” notes Giuseppe Carpaneto, Roma Tre University and his co-authors in their introductory article.

“Some studies have shown that children who participate in such programmes are more concerned about nature, want to learn more about environmental issues and are more prone to follow pro-environmental behaviour (e.g. waste recycling) than children who did not participate”.

In another article, included in the special issue, Fabio Mosconi of the Italian Agricultural Research Council and Sapienza University of Rome and his co-authors tested whether a specially trained Golden Retriever could locate the threatened hermit beetle faster and more efficiently than scientists using the standard “wood mould sampling” method.

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Additional information:

About the Life project MIPP

The main objective of the project MIPP is to develop and test methods for the monitoring of five beetle species listed in Annexes II and IV of the Habitats Directive (Osmoderma eremitaLucanus cervusCerambyx cerdoRosalia alpinaMorimus funereus).

3D avatars for three new rare ant species from Africa including the Obama ant

Three new, rare ant species recently discovered in Africa were named after important figures for the African biodiversity conservation – the former United States president Barack Obama, the Nigerian writer and environmental activist Ken Saro-Wiwa, and the world-renowned biologist Edward O. Wilson.

The scientists from the Okinawa Institute of Science and Technology Graduate University (OIST), who had their discovery published in the open access journal ZooKeys, used a new, revolutionary method to compile scans of the ants and create 3D avatars allowing for a unique and detailed visualisation of the insects’ insides.

https://skfb.ly/6sPvr

Curiously, the Obama ant, Zasphinctus obamai, was collected from the Kakamega Forest National Park, Kenya, located near Barack Obama’s ancestral family village. The 44th President of the United States of America is famous for his numerous initiatives towards the conservation of fragile natural habitats around the globe.

Ken Saro-Wiwa, who also has his name perpetualised in the new ant species Zasphinctus sarowiwai, was a Nigerian writer and environmental activist who, after campaigning against irresponsible oil development, was executed in 1995.

“By naming a species from threatened rainforest habitats after him, we want to acknowledge his environmental legacy and draw attention to the often-problematic conservation situation in most Afrotropical rainforests,” explain the biologists in their paper.

The third new species, Zasphinctus wilsoni, bares the name of the biologist Edward O. Wilson, whose foundation has contributed greatly to the resurrection of the Gorongosa National Park in Mozambique.

The 3D avatars were created with the help of X-ray microtomography, or micro-CT, which is a technology similar to the one used in hospitals for CT scans, but relying on much higher resolution. The three-dimensional reconstructions made it possible for the scientists to look into details as tiny as the ants’ mouthparts and even their legs and hairs. Moreover, this method does not require damaging the rare specimens.

“We saw things that nobody ever looked at,” says Dr. Hita Garcia, first author on the study and a member of the Biodiversity and Biocomplexity Unit at OIST.

While closely related ants had already been known as predators of other ant species, the scientists needed to study the data provided by the scans to confirm that the new species are top predators as well.

“Normally when you describe a new species, you don’t know much about its biology,” further explains Dr. Hita Garcia, “but with the 3D reconstructions researchers can discover details right away.”

To the biologists, these reconstructions hint at a future of virtual taxonomy with the potential to alleviate issues of time, money, and specimen damage.

Furthermore, the 3D models also allow for the data to be easily accessible from anywhere. To show this, the scientists have uploaded the reconstructions to the open access Dryad Digital Repository.

“If someone wants to see the Obama ant, they can download it, look at it, and 3D print it,” Dr. Hita Garcia points out.

“Since these ants are from very threatened habitats in Africa, we wanted to pick names that draw attention to the environment, and not just the ants,” he concludes.  “The rainforests in equatorial Africa, as well as the savannah in Mozambique, needs to be protected before the habitats and animals living within them are destroyed.”

 

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Find the original public announcement available via the OIST’s website: https://www.oist.jp/news-center/news/2017/8/29/say-hello-3d-obama-ant

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Reference:

Hita Garcia F, Fischer G, Liu C, Audisio TL, Economo EP (2017) Next-generation morphological character discovery and evaluation: an X-ray micro-CT enhanced revision of the ant genus Zasphinctus Wheeler (Hymenoptera, Formicidae, Dorylinae) in the Afrotropics. ZooKeys 693: 33-93. https://doi.org/10.3897/zookeys.693.13012

Do squirrels teach bears to cross the railroad? Grizzlies dig squirrel middens for grains

Grains have been reported to regularly trickle from hopper cars travelling via the railway located within the Canadian Banff and Yoho National Parks, attracting the local red squirrels.

As a result, the rodents have grown used to foraging on the spilled seeds, which they collect in underground storage areas where they can be discovered and dug up by grizzly bears. Grain-conditioned bears may frequent the railway more often than usual, resulting in increased mortality by trains strikes.

Furthermore, the dispersal, following caching and digestion of such seeds by both squirrels and bears, could lead to the spread and establishment of those agricultural plants in the area.

Figure1B

The case is investigated and discussed by members of the University of Alberta‘s research team of Julia Elizabeth Put, Laurens Put and Dr. Colleen Cassady St. Clair. Their study is published in the open access journal Nature Conservation.

It all began when members of the team found a grain-filled midden that was visited by a bear near where the same bear had bluff-charged Parks Canada employees. At the time, the researchers were investigating possible explanations for causes of grizzly bear mortality on the adjacent railway. Thus, an unexpected opportunity to document interactions between species and how those can lead to human-wildlife conflicts presented itself to the scientists.

The three basic questions brought up by Julia and her team were whether spilled grain could increase the number of squirrels near the rail; if other middens contained grain; and if other bears accessed grain in middens. Eventually, their data provided a resounding ‘yes’ to all of them.

In some mountain parks in North America, including Banff, grizzly bears are known to excavate squirrel middens to access whitebark pine seeds. The tree, however, is only found at high elevations far from the valley bottom where the railway is located. Nevertheless, this behaviour may easily translate to targeting other food items in middens, such as grain, speculate the researchers.

Once a bear consumes grain from a squirrel midden, it could initiate or reinforce a tendency to seek grain on the rail, where it is generally less concentrated. Such conditioning of food rewards could lead to grizzly bears spending more time in the area around or on the rails, where they would be at risk of being struck by trains.

“The only feasible mitigation for these effects is to reduce spillage from hopper cars via careful attention to loading and gate maintenance,” conclude the authors.

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Original source:

Put JE, Put L, St. Clair CC (2017) Caching behaviour by red squirrels may contribute to food conditioning of grizzly bears. Nature Conservation 21: 1-14. https://doi.org/10.3897/natureconservation.21.12429

Beetle’s Best Friend: Trained dogs most efficient in monitoring hermit beetle larvae

Hermit beetles (Osmoderma eremita) are considered at risk, but in order to be effectively protected, they first need to be identified and consistently monitored.

However, this turns out to be a tough task, given that the species is only present for a short time as an adult while it is also extremely elusive. On the other hand, although it remains as a larva for up to three years, once again, it is difficult to spot as it hides inside hollow trees living in the wood mould.

The standard method for detecting hermit beetles involves wood mould sampling which is not only arguable in its overall efficiency, but is also unreasonably time-consuming and quite damaging to both the species communities and their habitat.

Searching for an alternative, Italian scientists, led by Dr. Fabio Mosconi of the Italian Agricultural Research Council and Sapienza University of Rome, suggested that trained dogs might be more successful. Such conservation detection dogs are currently being widely deployed when searching for mammals, reptiles and birds and have already been tested for locating a number of invertebrates.

In their paper, published in the open access journal Nature Conservation, the team tested a training programme before comparing it with the traditional method. The study has been conducted as part of the MIPP Project aimed at the development of non-invasive methods for monitoring selected saproxylic beetles.

Image 2Starting from the choice of a dog, the scientists carefully made their choice from a number of individuals as well as breeds. They settled on a Golden Retriever – a breed widely used in searches for biological targets. As for the particular dog, they chose Teseo – a six-month pup coming from a line with a strong background in locating illegally imported animals and animal parts.

The training of Teseo began with the assignment of a trainer/handler and some basic obedience training, involving teaching simple commands, search games and agility activities.

The next step was introducing the dog to various types of odours, since the hermit beetles might give off a different odour dependent on their habitats, such as the presence of fungi, sawdust and other organic materials. Immediately after detecting the target smell, the animal would be given a reward such as food or play, so that its behaviour could be positively reinforced.

Then, the dog was taught to differentiate between different odours. The researchers presented a number of targets to the animal where it needed to select the right one. At this stage, the dog was only rewarded for correct signalling. Should the dog be distant from the trainer, a special clicker was used to ‘announce’ the treat in advance. The researchers noted that it was at this stage when the relationship between the dog and the handler needed to be really strong, so that the training was as efficient as possible.

In conclusion, the scientists reported a significantly higher probability (73%) of Teseo successfully detecting a tree colonised by the larvae, as opposed to two people conducting the traditional wood mould sampling (34-50%). Moreover, the dog would cover a particular area in a very short time when compared to the traditional method – on average it would take it 6 minutes and 50 seconds to examine the whole tree, while the operators using wood mould sampling would need about 80 minutes. Additionally, searching for larvae with dogs poses no risk to either the insects or other organisms that might be living in the trees.

Furthermore, the researchers provided a list of precautions in order to increase the efficiency when searching for beetle larvae with the help of trained dogs. The list included familiarising the dog with the survey site beforehand, opting for the part of the day with the most favourable atmospheric conditions and carefully monitoring the dog for signs of fatigue.

“A conservation detection dog is a powerful tool for locating O. eremita and these results can be useful for other related European species of Osmoderma“, commented the scientists.Image 3

“In fact, the use of a trained dog is a fast, accurate and non-invasive method that allows the detection of a target species in an area and to identify the colonised trees; this means that a conservation detection dog can locate new populations, can confirm the presence of the target species and can assist in the mapping of colonised trees in an area, accurately and efficiently.”

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Original source:

Mosconi F, Campanaro A, Carpaneto GM, Chiari S, Hardersen S, Mancini E, Maurizi E, Sabatelli S, Zauli A, Mason F, Audisio P (2017) Training of a dog for the monitoring of Osmoderma eremita. In: Carpaneto GM, Audisio P, Bologna MA, Roversi PF, Mason F (Eds) Guidelines for the Monitoring of the Saproxylic Beetles protected in Europe. Nature Conservation 20: 237-264. https://doi.org/10.3897/natureconservation.20.12688

Special Nature Conservation issue: Monitoring protected insects in the European Union

A collection of thirteen research papers has been published to address the conservation of saproxylic beetles and other insects listed in the Habitats Directive

With biodiversity loss well underway, conservation measures are urgent on a global scale and the European Union is no exception. However, for efficient strategies and actions to be put in place, plenty of information, acquired primarily through monitoring, is needed to identify priorities for the conservation of threatened species, also for the elusive saproxylic insects, an ecological group of species that depends on dead wood.

Monitoring and conservation of elusive invertebrates is a particularly complex task, as shown in the papers comprising the special issue “Monitoring of saproxylic beetles and other insects protected in the European Union,” supported by the EU’s LIFE Programme and published in the open access journal Nature Conservation. This special issue was produced in the framework of the Life Project “Monitoring of insects with public participation” (LIFE11 NAT/IT/000252 MIPP) and is a direct result of a European Workshop held in Mantova in May, 2017.

Colonel Franco Mason, project manager of the MIPP project, notes that the European Workshop was aimed primarily at monitoring of saproxylic beetles. The project MIPP resulted in two special issues: “Monitoring of saproxylic beetles and other insects protected in the European Union” and “Guidelines for the Monitoring of saproxylic beetles and other insects protected in the European Union“. The first one is now available in the open access journal Nature Conservation.

This is a female European stag beetle equipped with a radio transmitter in order to detect oviposition sites.
This is a female European stag beetle equipped with a radio transmitter in order to detect oviposition sites.

“No knowledge exists of the success rate of monitoring elusive invertebrates,” writes Dr. Arno Thomaes, Research Institute for Nature and Forest, Belgium, and his team in their paper assessing the feasibility of monitoring the European stag beetle. Having conducted their analysis, though, the scientists conclude that, “monitoring of stag beetles is feasible and the effort is not greater than that which has been found for other invertebrates.”

Alessandro Campanaro, a researcher at the “Bosco Fontana” National Center of Carabinieri, highlights the fundamental role of Citizen Science as an essential tool for acquiring data on species, while simultaneously increasing the public awareness about Natura 2000 and the role of saproxylic species in forests.

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Additional information:

About the Life project MIPP

The main objective of the project MIPP is to develop and test methods for the monitoring of five beetle species listed in the Annexes II and IV of the Habitats Directive (Osmoderma eremita, Lucanus cervus, Cerambyx cerdo, Rosalia alpina, Morimus funereus).

A decade of monitoring shows the dynamics of a conserved Atlantic tropical forest

Characterised with its immense biodiversity and high levels of endemism, the Atlantic Tropical Forest has been facing serious anthropogenic threats over the last several decades, demanding for such activities and their effects to be closely studied and monitored as part of the forest dynamics.

Cattle farming, expanding agricultural land areas and mining have reduced the Atlantic Forest to many small patches of vegetation. As a result, important ecosystem services, such as carbon stock, are steadily diminishing as the biomass decreases.

Brazilian researchers, led by Dr. Écio Souza Diniz, Federal University of Viçosa, spent a decade monitoring a semi-deciduous forest located in an ecological park in Southeast Brazil. Their observations are published in the open access Biodiversity Data Journal.

The team surveyed two stands within the forest to present variations in the structure and diversity of the plants over time, along with their dynamics, including mortality and establishment rates. They based their findings on the most abundant tree species occurring within each stand.

At the forest stands, the most abundant and important species for biomass accumulation are concluded to be trees larger than 20 cm in diameter, which characterise advanced successional stage within the forest.

“It is fundamental that opportunities to monitor conserved sites of the Atlantic Forest are taken, so that studies about their dynamics are conducted in order to better understand how they work,” note the scientists.

“The information from such surveys could improve the knowledge about the dynamics at anthropised and fragmented sites compared with protected areas.”

In order to encourage further research into the composition, diversity and structure of the Atlantic Forest over time and the subsequent contributions to the preservation of this threatened ecosystem, the authors made their data publicly available. The datasets, including species occurrences, are now openly accessible via the Global Biodiversity Information Facility(GBIF) and the biodiversity informatics data standard Darwin Core.

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Original source:

Diniz ES, Carvalho W, Santos R, Gastauer M, Garcia P, Fontes M, Coelho P, Moreira A, Menino G, Oliveira-Filho A (2017) Long-term monitoring of diversity and structure of two stands of an Atlantic Tropical Forest. Biodiversity Data Journal 5: e13564. https://doi.org/10.3897/BDJ.5.e13564

Effects of soil and drainage on the savanna vegetation in the northern Brazilian Amazonia

It is a well-known fact that environmental factors such as soil texture and drainage determine to a very large degree the vegetation appearance, richness and composition at any site. However, there has been little research on how these variables influence the flora in the marvellous savannas – large open areas characterised by a complex and unique network of natural resources and life forms.

Consequently, a Brazilian research team, led by Dr. Maria Aparecida de Moura Araújo, Universidade Federal de Roraima, investigated the hydro-edaphic conditions in the savanna areas in the northern Brazilian Amazonia. Their study, complete with an openly available and ready for re-use dataset, is published in the open access Biodiversity Data Journal.  

Image 1_Annonaceae_Xylopia aromatica_treeIn the course of the Program for Biodiversity Research, managed by the Brazilian government, the scientists sampled 20 permanent plots in two savanna areas in the state of Roraima, located in the northern of the Brazilian Amazon. As a result, the team reports a total of 128 plant species classified into 34 families from three savanna habitats with different levels of hydro-edaphic restrictions.

Amongst the various factors playing a role in the soil characteristics of the area, are the tectonic events and past climatic fluctuations which have occurred in the most recent period of the Cenozoic era. Paleo, as well as modern fires are likely to be other culprits for the specific conditions.

In conclusion, the authors suggest that the most restrictive savanna habitats – the wet grasslands, represent the home to less structurally complex plants, compared to the well-drained shrubby localities.

“The present study highlights the environmental heterogeneity and the biological importance of Roraima’s savanna regarding the conservation of natural resources from the Amazon,” say the scientists.

Image 2_Convolvulaceae_Merremia aturensis_herb“In addition, it points out the need for greater investment in floristic inventories associated with greater diversification of sites, since this entire ecosystem has been rapidly modified by agribusiness.”

Licensed under a Creative Commons License (CC-BY 4.0) and available in a Darwin Core Archive DwC-A format; the complete dataset is openly available via the Global Biodiversity Information Facility (GBIF).

 

Original source:
Araújo M, Rocha A, Miranda I, Barbosa R (2017) Hydro-edaphic conditions defining richness and species composition in savanna areas of the northern Brazilian Amazonia. Biodiversity Data Journal 5: e13829. https://doi.org/10.3897/BDJ.5.e13829

Conservation and nameless earthworms: Assessors in the dark?

Species that live exclusively in a single region are at a particular risk of extinction. However, for them to be protected, thorough assessments of the environmental impacts need to be performed.

There are more than 100 earthworm species living in the soil and dead wood of KwaZulu-Natal Province, South Africa. Most of them live exclusively in small regions in the province, which makes them extremely vulnerable.

To scientists Dr Adrian J. Armstrong, Ezemvelo KZN Wildlife, and Ms Thembeka Nxele, KwaZulu-Natal Museum, the problem is twofold. Firstly, they note that the expression “out of sight, out of mind” is very suitable for the case of the endemic earthworms in South Africa. Secondly, they point out that the lack of common names for these species is a stumbling block that hinders their inclusion in conservation assessments.

As a result, the researchers try to rectify this situation by assigning standardised English names to the endemic earthworms in KwaZulu-Natal. Their article is published in the open access journal African Invertebrates.

Scientific names are often intractable to non-specialists, and the lack of common names leaves environmental assessors in the dark when they need to figure out which earthworms may occur at a development site. In the meantime, it has been found that about 50% of the native vegetation in KwaZulu-Natal has already been removed as a result of infrastructure construction and the figure is rising.

“The indigenous earthworms generally don’t survive in developed areas,” say the authors.

For instance, the informal use of an English name (green giant wrinkled earthworm) for the species Microchaetus papillatus, has facilitated the inclusion of this species in environmental impact assessments in KwaZulu-Natal.

While the green giant wrinkled earthworm does occur in a relatively large and rapidly developing area in KwaZulu-Natal, other species live in smaller areas that have been urbanised even more.

The extinction of these earthworms is not only undesirable from the point of view of biodiversity advocates – the role of this group of soil organisms is impossible to replace fully with non-native earthworms. For example, some of the large indigenous earthworms (more than 1 m in length) burrow much deeper than the non-native species, thereby enriching and aerating the soil at greater depth.

The authors are hopeful that by giving the indigenous earthworms in KwaZulu-Natal common names, the threatened and endemic species will be conserved through inclusion in environmental impact assessments. Furthermore, they believe that earthworms could draw attention to the areas where they occur whenever a choice for new protected areas is to be made.

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Original source:

Armstrong AJ, Nxele TC (2017) English names of the megadrile earthworms (Oligochaeta) of KwaZulu-Natal. African Invertebrates 58(2): 11-20. https://doi.org/10.3897/AfrInvertebr.58.13226

Gehry’s Biodiversity Museum – favorite attraction for the butterflies and moths in Panama

Ahead of Gehry’s Biodiversity Museum‘s opening in October 2014, PhD candidate Patricia Esther Corro Chang, Universidad de Panama, studied the butterflies and moths which had been attracted by the bright colours of the walls and which were visiting the grounds of the tourist site.

The resulting checklist, published in the open access journal Biodiversity Data Journal, aims to both evaluate the biodiversity and encourage the preservation and development of the Amador Causeway (Calzada de Amador) and the four Causeway Islands. The name of the islands derives from their being linked to each other and the mainland via a causeway made of rocks excavated during the construction of the Panama Canal.

The researcher reports a total of six butterfly and eight moth families, identified from the 326 specimens collected over the course of 10 months from the botanical garden of the museum and adjacent areas. They represent a total of 52 genera and 60 species.

IMG_0096Interestingly, the eye-catching bright colours of the walls of the museum seem to play an important role for the insect fauna of the area. Not only are numerous butterflies and moths being attracted to the site, but they also express curious behaviour. On various occasions, for example, a species of skipper butterfly was seen to show a clear preference for yellowish surfaces. In their turn, a number of butterfly predators, such as jumping spiders, are also frequenting the walls.

The article in the journal provides knowledge of the butterfly and moth fauna at the mainly vegetated study area, located on a narrow strip of water distant from the city of Panama.

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Original source:

Corro-Chang P (2017) Behavioural notes and attraction on Lepidoptera around the Gehry’s Biodiversity Museum (Causeway, Calzada de Amador, Panamá, República de Panamá). Biodiversity Data Journal 5: e11410. https://doi.org/10.3897/BDJ.5.e11410