Dusty-throated antshrike
The dusky-throated antshrike is common in western Brazil, Colombia, Ecuador, and Bolivia. It’s an understory bird, meaning it dwells in the lower reaches of the rainforest, and, as its name suggests, loves a good insect for a meal. From over 500 specimens measured in the last 40 years, the team determined that the birds’ average mass has decreased by a whopping 6.36%, while wing length has increased by 1.62%. The mass-to-wing ratio reduced by over 10%, one of the largest reductions among the surveyed birds.
