A race against pine: Wood-boring wasp in North America threatened by a Eurasian invader

  • Pensoft Editorial Team
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  • January 22, 2018
  • Invasive species have diverse impacts in different locations, including biodiversity loss, as a result of native species being outcompeted for similar resources. A U.S. research team, led by Dr. Ann Hajek, Cornell University, studied the case of an aggressive Eurasian woodwasp that has recently established in North America and poses a threat to a native species. […]

    Feeding strategies in competing hummingbird species observed in a small area in Brazil

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  • May 2, 2017
  • Being the vertebrates with the highest metabolic rate thanks to their rapid wing flaps, the hummingbirds have evolved various types of feeding behaviour. While the nectar-feeders tend to go for food high in energy, strong competition affects greatly their preferences and behaviour towards either dominance, subordination, a strategy known as trapline and a fourth one […]

    To be fragrant or not: Why do some male hairstreak butterflies lack scent organs?

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  • September 17, 2015
  • Female butterflies generally choose among male suitors, but in the tropics with hundreds of close relatives living in close proximity, how can they decide which males are the right ones? After all, if she mates with a male of another species, she is unlikely to have surviving offspring. One solution is that males of some […]