Category: Vertebrate Zoology

Tropical rainforest patches perched on isolated granite mountains in northern Mozambique have yielded four new species of Sylvan Chameleons, according to a new study by Prof. Krystal A. Tolley and Dr. Werner Conradie, recently published in Vertebrate Zoology.

The new species have been named after the animal behavior scientist and conservationist Jane Goodall, the chemist Rosalind Franklin, and the concept of “vanishing”,  honouring scientific pioneers while sounding an alarm about disappearing habitats. The research reveals that each “sky island” harbours its own, previously unknown chameleon species, and highlights the urgent need to conserve these fragile forest habitats.

These mountains rise sharply from the surrounding savanna, trapping clouds and rain and creating cool, moist refuges in an otherwise dry landscape This results in each forest being isolated, making them true ‘sky islands’, and because of this isolation, many of their species occur nowhere else on Earth.

says Prof. Tolley.

Why search these mountains?

Until the 2000s, most of northern Mozambique’s sky islands had been poorly surveyed, even compared with other remote parts of Africa. The team set out to investigate whether the isolated forests on each mountain hold unique reptile and amphibian species that evolved there in isolation. With tropical forests across Africa being rapidly cleared in favour of agriculture, the researchers were heavily motivated by a race against time – species could go extinct before they are even discovered.

How were the new species identified?

The team had to first carry out several different surveys of the remote mountains to assess and catalogue the different reptile and amphibian species present. Noting that there were populations of chameleons on each mountain, measurements and samples were taken. Back at the lab, the team used an approach called the General Lineage Species Concept.

This combines different lines of evidence to identify species. In this case, they sequenced four genes (DNA sequences) from Sylvan Chameleon populations from different mountains and compared the genetic data among these. This was then combined with another type of evidence, body features, to come up with a ‘balance of evidence’ as to whether each mountain has its own species. 

Although the chameleons look very similar between different mountains, the DNA told a different story. A phylogeny – a type of family tree built from the genetic data – showed that individuals clustered strictly by mountain. This indicates that each sky island population has been separated for millions of years and does not interbreed with populations on neighbouring peaks.

The similar body shape across species reflects their shared adaptation to life in forest habitats, rather than them being the same species. According to Dr. Conradie “In the same way, African and Asian elephants both look like ‘elephants’ but are distinct species that have evolved similar body forms for similar lifestyles.”

Honouring scientists and a warning about loss

Behind each of the three names lies a deliberate choice. Nadzikambia goodallae, from Mount Ribáuè, honours Dr. Jane Goodall’s pioneering work on African chimpanzees that has transformed our understanding of animal behaviour and inspired global conservation efforts. This chameleon is endemic to the region.

Before Dr. Jane Goodall became a conservation icon, she spent decades in the forest observing how every species has a role to play in maintaining our fragile ecosystems. Naming this wonderfully unique Sylvan Chameleon for Jane is a fitting tribute to her advocacy and a reminder of the importance of protecting forest landscapes for all animals, including people.

says Anna Rathmann, Executive Director of the Jane Goodall Institute USA.

Nadzikambia franklinae, from Mount Namuli, recognises Rosalind Franklin, whose foundational work on DNA structure underpins the very genetic tools used to identify these species.

The third species from Mount Inago is named Nadzikambia evanescens, meaning “vanishing”, to draw attention to its disappearing habitat and the many species worldwide that may be lost before they can be described.

The fourth species, The Chiperone sylvan chameleon (Nadzikambia nubila), was collected by a stream on Mount Chiperone and takes its name from the “Ciperoni” – the local term for the heavy, cloud-laden weather that brings orographic rainfall to the area. This persistent cloud cover sustains the mountain’s mid-elevation wet forest, and the epithet nubila derives from the Latin nubilus, meaning “cloudy”.

Community-led conservation is key

The discoveries come at a time when tropical forests, especially in Africa, are being cleared at alarming rates. The small, isolated forests on Mozambique’s sky islands are particularly vulnerable. The study highlights that local community involvement can make a decisive difference.

On Mount Chiperone, the forest is considered sacred, and cultural values have helped protect both the habitat and its wildlife. Mount Mabu has benefited from more than a decade of community-based conservation.

Together, these two mountains hold the most intact forests surveyed in the study, showing that forest clearance is not an inevitable trade-off for local livelihoods when communities are empowered and supported, and their beliefs are in sync with conservation.

Original source:

Tolley K, Conradie W (2026) Sky Islands of Mozambique harbour cryptic species of chameleons: Description of four new species of sylvan chameleons (Squamata: Chamaeleonidae: Nadzikambia Tilbury, Tolley & Branch, 2006). Vertebrate Zoology 76: 207-246. https://doi.org/10.3897/vz.76.e178403