The Steller's jay is are colorful and noisy bird native to western North America. It has a blackish-brown, black, or dark blue head, depending on the latitude, with lighter streaks on the forehead. This dark coloring gives way from the shoulders and lower breast to silvery blue. The primaries and tail are a rich blue with darker barring. Birds in the eastern part of its range along the Great Divide have white markings on the head, especially over the eyes; birds further west have light blue markers and birds in the far west along the Pacific Coast have small, very faint, or no white or light markings at all.
Steller's jays are found in western North America as far east as the eastern foothills of the Rocky Mountains from southern Alaska in the north to northern Nicaragua. They are also found in Mexico, south-central Guatemala, northern El Salvador, and Honduras. Although Steller's jays prefer coniferous forests they can also be found in pine-oak woodlands as well. They are common in residential and agricultural areas with nearby forests.
Steller's jays are highly social and often form flocks of various sizes. They travel in groups, play with each other, or chase each other while flying in the air. These birds forage during the day. They gather food both from the ground and from trees. They often cache seeds in the ground or in trees for later consumption. Steller's jays frequently scavenge picnics and camp sites. They will visit feeders where they prefer black-oil sunflower seeds, white striped sunflower seeds, cracked corn, and are especially attracted to whole raw peanuts. Steller's jay have numerous and variable vocalizations. One common call is a harsh SHACK-Sheck-sheck-sheck-sheck-sheck series; another skreeka! skreeka! call sounds almost exactly like an old-fashioned pump handle; yet another is a soft, breathy hoodle hoodle whistle. Their alarm call is a harsh, nasal wah. Females sometimes produce a rattling sound, while males make a high-pitched gleep gleep.
Steller's jays are omnivores; their diet includes a wide range of seeds, nuts, berries, and other fruit. They also eat many types of invertebrates, small rodents, eggs, and nestlings such as those of the marbled murrelet. They have even been known to eat small reptiles, like snakes, and lizards.
Steller's jays are monogamous and form long-lasting pair bonds. They breed from late March to early July, with a peak in April and May. The pair usually locates its nest in a conifer but sometimes it can be built in a hollow in a tree. The nest is constructed of natural materials or scavenged trash, often mixed with mud. The female lays between 2 and 6 eggs which are oval in shape with a somewhat glossy surface. The background color of the egg shell tends to be pale variations of greenish-blue with brown- or olive-colored speckles. The clutch is usually incubated entirely by the female for about 16 days. The male feeds the female during this time. The chicks hatch naked and with closed eyes. They begin to fly 18 days after but parents continue to feed them for one month more.
The Steller’s jay doesn’t face any major threats at present.
According to the All About Birds resource the total breeding population size of the Steller’s jay is around 2.8 million individuals. Currently, this species is classified as Least Concern (LC) on the IUCN Red List and its numbers today are increasing.