At the Caldwell Zoo in Tyler, visitors will find the Amazon River's Edge, and this section of the zoo has some pretty colorful and winged residents - the macaws. And they've got a sweet ride known as ...

The reintroduction of the Spix’s macaw in Brazil’s Caatinga shrubland faces a health crisis: seven birds have tested positive for circovirus, a highly contagious, potentially fatal disease with no ...

1. Mechanisms causing costs of reproduction in birds are poorly understood. Here we focus on the renewing of feathers (=moult) which may be a possible physiological link between successive breeding ...

Standing in a northern Everglades marsh in 2015, biologist Corey Callaghan watched as an enormous flock of tree swallows wheeled in the morning sun. As the mass of birds passed overhead, Callaghan and ...