White-crowned manakin
Female white-crowned manakins, like the one pictured above, do not look anything like their name suggests. The name refers to the male’s plumage, which is all black except for a hemispheric tuft of white on the dome of their head. The average mass of these birds has plummeted, according to the team’s study, with a decrease of 4.35% in the last 40 years. Like other birds, its wingspan grew, with a 0.8% increase in wing length.
