I have seen numerous references to Blue Jays as “the sentinels of the forest,” sounding the alarm of danger for their fellow birds and other woodland creatures. I feel that this title attributes a benevolent quality to the Blue Jay’s actions which is totally unwarranted. True, Blue Jays often send out loud cries which serve as a warning to the rest of the animals in the immediate vicinity. However, rather than the primary purpose of the call, this is often a coincidental side effect, if not a deliberate misrepresentation, designed to scare the other birds away from what the Blue Jays covet for themselves.
Based on my observations, rather than the overseer of safety, I think it would be more accurate to classify the Blue Jays as the bombastic and inflated characters that they are. John James Audubon, for whom many bird watching societies are named, referred to Blue Jays as “mischievous.” Like the bully in a playground, the Blue Jays very loudly and pompously push their way into the midst of the feeder crowd, using their superior size and prancing movements to intimidate and push their fellow birds from the seed or perch they plan to possess.
Don’t get me wrong, Blue Jays are a beautiful bird. Familiar to most people, at about twelve inches long, the Blue Jay ‘s back, head and tail are a bright, light blue, decorated with horizontal stripes along the bottom of its wings and length of its tail. A fluffier white-gray belly and neck provides some contrast. Its face is bordered in a black semi-circle, almost like a beard. Its head is topped with a distinct crest, adding an almost regal formality to the Blue Jay’s overall appearance.
One of the reasons Blue Jays are so familiar to us is directly due to human interaction. Blue Jays have adapted well to human populations, both urban and suburban and are just as comfortable in a yard or park as they are in the forest. People are a consistent and convenient source of food all year and as a result very few Blue Jays migrate in the winter. They have a varied diet of bugs, fruit, seeds, nuts (they are very partial to peanuts specifically) and carrion which allows them additional flexibility in their various habitats. They also cache food, a behavior uncommon in birds. In the spring, Blue Jays supplement their diets by attacking the nests of other birds and eating their eggs or newly hatched nestlings. Yes, Blue Jays eat babies. While they are not the only bird species to behave in this manner, this activity is leading to a decline in many forest’s song bird populations as nest robber population, including the Blue Jay increase due to their positive relations to humans.
Blue Jays are interesting it watch. The have a curious and inquisitive nature that seems to imply a deeper intelligence. Matched with their seeming fearlessness, these qualities find them often invading humans’ personal space bubbles similar to seagulls approaching beach goers. But while their “mischievous” actions may be funny, remember that they can also be aggressive and even mean to other species.
Blue Jays can definitely hold their own, and have been known to mob (or attack as a group) owls and other large predator birds. Their imitation of a hawk can scatter birds in an instant and the juveniles seem to pick up this loud-mouth quality very early on. The cries of a juvenile Blue Jay are some of the loudest and most unsettling sounds of nature. They seem to feel that their parents need a constant verbal reminder to feed them immediately! This behavior lasts for the first twenty days of their life, after which point they are responsible for feeding themselves.
So there you have it, a loud-mouth bully with aggressive behavior. Next time you admire the beautiful blue of a Blue Jay, just remember that appearance is only one aspect of its complex character.
To experience the sounds of the Blue Jay for yourself, visit https://www.allaboutbirds.org/guide/Blue_Jay/sounds