Bluejays have been spotted attacking other birds' nests and eating either their young nestlings or eggs. Blue color is more obvious on the blue jay’s plumage with the rest of the plumage displays white, gray, and black. They make a number of different calls including the distinctive "jay-jay". The incubation period lasts for 17 – 18 days. The clutch may be two to seven eggs, which are blueish or light brown with brown spots. Seldom do they attack smaller birds. Blue jays remain active most of the time, when a predator enters the woods she will announce far and wide by loud-mouthed. Don't let their beauty or fact that they have a baseball team named after them deter you from thinking blue jay birds aren't a bunch of airborne jerks. Blue jay (Cyanocitta cristata) has long been recognized as a songbird with fairly noise calls. Blue Jays, Crows , Roadrunners, Chipmunks, and Squirrels are notorious for eating hummingbird eggs and baby hummingbirds as a nice little treat. These sounds help other jays to keep alert from hawks. This acorn-eating-habit makes jays the predator of oaks. They also feed on nestlings and eggs of other birds but we are not sure how common this habit is among jays. Being highly curious, blue jays are one of the most intelligent birds like corvids. In summer months, they will also eat insects such as grasshoppers and caterpillars. Sometimes, they may sound beneficial to other birds in that they scream all around when predators are nearby. With their pinkish plumage, and characteristic flash of blue, they will be familiar to many people as woodland birds that are increasingly seen in gardens, even in cities. The blue jay is a moderately slow flier (roughly 32–40 km/h (20–25 mph)) when unprovoked. However, most of their migrations are still a mystery. The young jays migrate in large numbers as compared to adults. If you've ever witnessed a blue jay going after another bird or even a human, you may have wondered "why are blue jays aggressive?" Blue jays migrate in flocks consisting thousands of individuals around the Atlantic coasts and great Lakes. The coloration of the blue jay comes from light interference due to the internal structure of their feathers - if a feather is crushed, it will not maintain its blue coloration. Virtually all the raptorial birds sympatric in distribution with the blue jay may prey upon it, especially swift bird-hunting specialists such as the Accipiterhawks. They often drive other birds away from bird feeders. They are capable to store acorns in their mouth. When in captivity, they can learn to imitate human speech or meowing cats. Blue jays can also store 5 acorns at a time for later feeding. Thousands of these birds are known to migrate in flocks along the Atlantic coasts and Great Lakes; all these migrations take place in daytime. Were it not for the seed-chasing behavior of the birds, the oaks would reproduce less successfully. These colorful birds are talented enough mimic calls of hawks with Red-shouldered hawk in particular. The wingspan measures around 34 – 43 cm (13.4 – 16.9 inches). The blue jay is a noisy, bold, and aggressive passerine. Blue jays can also be extremely territorial over both their food and nesting areas, and are not afraid to attack other birds. The nestling period lasts for 17 – 21 days. Recently the blue jay’s range got extended to northwestwards and is seldom found flying in the southern Canadian Pacific Coast and northern US ranging from Midwest to the eastern coastal regions. Blue jays predominantly feed on nuts, insects, seeds in shrubs and trees on the ground; they also consume grains. Both parents contribute towards making of a nest but females do most of the construction. They have also been observed diving at dogs, cats, and humans who get too close. They travel great distances in order to seek fresh graves in cemeteries, rootlets, or sometimes newly trees fallen. Anyone who's ever been awaken by their loud cries know these birds have a large vocabulary and are not afraid to use it. Blue jay is bold and noisy bird; flies around 32 – 40 km/h when disturbed. However, blue jays have also been known to be much more brutal with their dining choices, chosing to eat the offspring of other birds. Researchers noted several blue jays raised in a lab ripping at the newspaper that lined the bottom of their cage, which they then used like a broom to collect out of reach food pellets. Blue jays are considered to be vegetarian, and enjoy eating peanuts, all kinds of seeds, and berries. Blue jays may not hold court like crows, but they can mimic the cries of hawks, use tools, and work together in groups. The longest lived blue jay was 17 years and 6 months old.
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