Common Tern vs Bay-headed Tanager

The Common Tern and the Bay-headed Tanager are easily distinguished by their habitats and plumage. The tern is a slender seabird with a sharp bill and predominantly white plumage, while the tanager is a colorful forest bird with a distinctive bay-colored head.

Look for the Common Tern's sharp, pointed wings and forked tail in flight. Note the Bay-headed Tanager's distinctive bay-colored head and social behavior in forested areas. Habitat is a key differentiator: terns are near water, tanagers in forests.

The Common Tern is larger, with a wingspan of about 77-98 cm, while the Bay-headed Tanager is smaller, typically around 13-14 cm in length.

Common Terns have a sleek, white body with a black cap and a deeply forked tail. In contrast, Bay-headed Tanagers are vibrant, with a bay-colored head, green or blue body, and no forked tail.

Common Terns are often seen in flight over water, diving for fish, while Bay-headed Tanagers forage in trees for fruits and insects, often in mixed-species flocks.

Common Terns are found in coastal and inland water bodies, whereas Bay-headed Tanagers inhabit tropical forests and edges.

Common Terns have a harsh, grating call, often heard in colonies. Bay-headed Tanagers have a softer, more musical call, typical of tanagers.