This bird made ... They occur in light and dark (rare) morphs, females are slightly larger than males, juveniles different from adults. Polytypic (6 ssp.; nominate in North America).

There are currently 18 Bluebird Trails with 400 nest boxes, many on farm and ranch lands surrounding the city. Each trail has ...

A study led by scientists from the American Museum of Natural ... This study confirms his theory, showing that these birds glow under both blue and UV light. Not all birds exhibit biofluorescence.

Birds without natural immunity that migrate or roost together in large flocks, such as geese, are most likely to die in large numbers. A recent bird flu outbreak among migratory eared grebes in Utah ...