Tricolored blackbirds form the largest colonies of any North American land bird, often with breeding groups of tens of thousands of individuals. In the 19th century, some colonies contained more than ...

The male tri­colored blackbird has a thinner, more pointed bill, a white epaulet border, colder gray-buff upperpart markings in winter, and a different voice. One of the most abundant birds in ...

Juveniles of both sexes look similar to adult females, but are much paler in color. HABITAT: The tricolored blackbird ... that despite reductions in colony size and numbers, the bird's distribution ...