As the tight beam of the scanning electron microscope focused on a tiny fragment of ancient eggshell, I immediately saw one of the inner shell’s layers had been partially reabsorbed. This exciting ...

A century or more before the Spanish set foot in the Americas, birds of a multi-hued feather were bred together in what’s now a desolate part of northwestern Mexico. That, at least, is the implication ...

Somewhere in the American Southwest or northern Mexico, there are probably the ruins of a scarlet macaw breeding operation dating to between 900 and 1200 C.E., according to a team of archaeologists ...

American Antiquity, Vol. 58, No. 2 (Apr., 1993), pp. 270-276 (7 pages) The scarlet macaw (Ara macao) was an important prehistoric trade item in northern Mexico and southwestern United States. Paquime ...

Under the scorching sun of Brazil’s semiarid Caatinga shrubland, squawks tear through the skies, signaling the arrival of one ...

After a fifth and final season of field work, volunteers with the Wisconsin Breeding Bird Atlas II documented 226 species of breeding birds in the Badger State, including 13 species not found in the ...