All 50 states and the District of Columbia have official birds. To become a state bird, it helped to be familiar, colorful, and have a punchy song. The Northern Cardinal perches as state bird in seven eastern states, the Western Meadowlark in six western states. Bluebirds — like this…

A birder may have a target bird so elusive that the bird becomes a kind of "jinx bird." But there was a real bird by that name! The bird once called the "jynx" is known today as the Eurasian Wryneck. When a wryneck is threatened, it twists its head like a snake and hisses. This behavior…

American Bitterns nest in marshes across the northern half of the United States and throughout much of Canada, and they winter along both U.S. coasts south into Central America. But in some places, bitterns are in serious trouble. Much of the extensive, shallow marshland they once bred in…

Muchas aves juegan solas, balanceándose, deslizándose o rodando. Algunas especies interactúan con objetos, como dejar caer una piedra y recogerla nuevamente. Pero unas pocas aves juegan con otros miembros de su especie. Los científicos lo llaman juego social. Este tipo de interacción…

Elegant Black Terns breed in summer on secluded wetlands across the northern states and Canada. Because of major losses of wetlands in their breeding range — especially in Canada's prairie provinces — Black Tern numbers have dropped dramatically since the 1960s. The future of this…

Los vuelvepiedras rojizos ( Arenaria interpres) destacan sobre las aves playeras. Al emprender el vuelo, el vuelvepiedras despliega un vívido e inconfundible patrón de franjas oscuras y claras a lo largo de sus alas y cola. Y ese parloteo tan cómico es único en su tipo. A diferencia de la…

Beaks suited for opening tough, hard seeds — thick, conical beaks — evolved in more than one lineage of birds. Rose-breasted Grosbeaks are related to cardinals, which also have powerful beaks. Evening Grosbeaks belong to the finch family, which includes goldfinches and crossbills — an…

Ross’s Geese and Snow Geese are both white-bodied waterfowl with black wingtips that can be difficult to tell apart. The pair are a great example of what science calls sister species, which occur when a portion of one species takes an evolutionary step away from the rest, resulting in a…

Found in the Sierra Madre, the Arizona Woodpecker has a special connection to the mountain range. Sharing mid-elevation pine and oaks with fellow border straddlers, these small brown birds with white and brown cheeks stand out from other Woodpeckers with their heavily marked white…

La forma en que algunas aves sacuden, agitan o despliegan la cola puede ser muy característica. Una cola que se sacude o se despliega con rapidez puede sugerirle a un depredador que el ave está especialmente alerta o que no será fácil de atrapar, y al mismo tiempo, puede advertir al resto…