Colibrí females acquire the appearance of the male

A study published in the magazine Current Biology states that the females of white collar jacobins acquire the appearance of males to avoid harassment of other specimens during their diet."The [brilliant] coloration in the birds is associated with aggressiveness," said Jay Falk, an evolutionary environmentalist at the University of Washington and principal researcher of the study."By just looking like males, the stalkers deter," he concluded.

Among the birds, males are usually those who wear fascinating and colorful feathers, especially to attract and cut the females.The white -collar jacobin male, a typical tropical hummingbird, has an intense blue head and a vibrant green back, while females are usually monochromatic.Is not always that way.According to the report, in Panama it was observed that 30 % of the more than 120 females that were captured between 2015 and 2019 initially looked like males.

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— Dr Millie Sat Jan 25 12:33:24 +0000 2020

This study gives light to the role, rarely quantified, which plays the ornamentation of female birds, but also highlights that evolutionary forces that have a social function rather than a sexual function."It seems that if you are ornate and feed on these feeders, they bother you less," said the co -author of the Dustin Rubenstein study, an evolutionary environmentalist from Columbia University and explorer of National Geographic.