A large, dark jay of evergreen forests in the mountainous West. The Steller’s Jay is a feeder visitor many backyard birders enjoy seeing. A series of students and I will investigate mechanisms behind the complex social system and ecological relationships that drive the distribution and dynamics of the local jay population. Mobbing behavior has been found to differ with respect to many individual, group, and encounter level factors. Smart, gregarious and handsome, the black and blue Steller’s jay is named after German naturalist Georg Steller. We've often seen a hawk with it's talons on the back of a Steller's Jay. Noisy and bold, a Steller’s Jay will be among the first go on the defensive to mob a predator. When nesting, the site is chosen by both the male and female. Steller's Jay: Large crested jay with a black head and crest and a blue body. Measuring 12 to 13 1/2 inches in length. The Steller's jay is sometimes colloquially called a "blue jay" in the Pacific Northwest. From a distance, the Steller’s, which is related to the blue jay , may look like just a dark crested bird. The Steller’s jay is a bold and aggressive species frequently found scavenging in campgrounds, picnic areas, and feeding stations in the West. Social behavior of Steller’s jays. When patrolling the woods, Steller’s Jays stick to the high canopy, but you’ll hear their harsh, scolding calls if they’re nearby. Steller's Jay Habits. The Steller's Jay squatts as close to the ground as it can and screams. North America's largest Jay, the Steller's Jay is also known as the loudest of its kind. He first classified them on an expedition to an Alaskan island in 1741. Description Of Bird. Both have a crest. The experiments were performed between 8:00 AM and 3:00 PM in the winter months (November to March) when Steller’s jays form flocks and regularly visit feeders. The same subspecies of Steller’s jay, Cyanocitta stelleri annectens, occurs at both of these sites (Walker et al. Together they construct the nest from stems, grass and moss. Wings and tail are blue with black bars. 2016). Found high on the mountain slopes of the west, this bird lives its life much like its eastern relative, the Blue Jay. Steller's jays can imitate the vocalizations of many species of birds, other animals, and even sounds of non-animal origin. They tend to gang up on the local hawk to chase the hawk out of the property. Mobbing is a widespread anti-predator behavior with multifaceted functions. To better understand the factors that influence mobbing behavior in wild Steller’s jays (Cyanocitta stelleri), I induced mobbing behavior using 3 predator Steller's Jay & Hawk Behavior. Feeds on pine seeds, acorns, fruit, frogs, snakes, carrion, insects and eggs and young of other birds. Steller's jays are usually loud both day and night, however, during the nesting period they are quiet in order to not attract attention. Behavior and Ecology of Steller's Jay . 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