Blue jay uses devious trick to hog food. 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. 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. Behavior and Ecology of Steller's Jay . Steller's Jay: Large crested jay with a black head and crest and a blue body. The Steller’s jay is a bold and aggressive species frequently found scavenging in campgrounds, picnic areas, and feeding stations in the West. North America's largest Jay, the Steller's Jay is also known as the loudest of its kind. Found high on the mountain slopes of the west, this bird lives its life much like its eastern relative, the Blue Jay. The Steller's jay has a dark crest on its head that it can puff up or fold back, and just above the eyes are streaks of blue in the surrounding black feathers. Wings and tail are blue with black bars. Steller's jays are usually loud both day and night, however, during the nesting period they are quiet in order to not attract attention. These stylish "eyebrows" are one way to tell an Alaska Steller's jay from those of the western interior states where the markings are white. The Steller's Jay squatts as close to the ground as it can and screams. When patrolling the woods, Steller’s Jays stick to the high canopy, but you’ll hear their harsh, scolding calls if they’re nearby. The Steller's jay is sometimes colloquially called a "blue jay" in the Pacific Northwest. Head has slight white eyebrow, forehead, and chin spots. Feeds on pine seeds, acorns, fruit, frogs, snakes, carrion, insects and eggs and young of other birds. 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. Steller’s Jays are common in forest wildernesses but are also fixtures of campgrounds, parklands, and backyards, where they are quick to spy bird feeders as well as unattended picnic items. He first classified them on an expedition to an Alaskan island in 1741. Both have a crest. Steller's Jay Habits. Mobbing is a widespread anti-predator behavior with multifaceted functions. The same subspecies of Steller’s jay, Cyanocitta stelleri annectens, occurs at both of these sites (Walker et al. Social behavior of Steller’s jays. Steller's Jay & Hawk Behavior. Unlike other jays, they may also use mud. Description Of Bird. The Steller’s Jay is a feeder visitor many backyard birders enjoy seeing. When nesting, the site is chosen by both the male and female. Measuring 12 to 13 1/2 inches in length. 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