Rufous-capped antthrush
Once the team caught the birds (using a large mesh net), they identified them, marked them, measured their wing length and body mass, and then released them. Here, a fufous-capped antthrush’s wing is studied by one of the scientists. Its average wing size has increased by about 2%, to about 3.29 inches, based on a sample of over 200 birds. Meanwhile, its average mass has gone down by over 3%.
