Karen Perry from Wild Birds Unlimited

Just like bluebirds, blue jays have no blue pigments in their feathers. Instead, each feather barb has a thin layer of cells that absorb all wavelengths of color except blue. Only the blue wavelength is reflected and scattered, resulting in their blue appearance to our eyes.
Blue jays are often chastised for their known practice of eating eggs and nestlings of other birds. But extensive research has proven this to be a very rare occurrence, with only 1% of the study population showing any evidence of this behavior.
The blue jay is a talented mimic. Its version of a red-shoulder hawk’s call can fool even the most experienced birders. We have had many hawk visits in our yard this winter and let me tell you when I hear the blue jays mimic – the birds in the yard literally fly like the wind into cover. Low and behold there is a hawk hanging out shopping for lunch!
Peanuts in the shell are a favorite among blue jays. Watch your feeder to see if you can observe them shaking peanuts to tell if the shell is full or empty. Wild Birds Unlimited has some “whole” peanut feeders. It’s fun to watch a blue jay fly to the feeder hardly land on it and off it goes with a whole peanut!
Blue jays will bury seeds up to 2½ miles from their original source which is a record for any bird. This behavior has greatly helped with the range expansion of many oak species.
A blue jay was observed packing over 100 sunflower seeds into its gullet during just one visit to a feeder.
Blue jays will cache seeds and nuts to retrieve later, and make repeated trips to feeders to gather food and hide it in a safe spot.Blue jays have been known to live over 17 years!
I am a blue jay fan. We had more than one pair nest in our yard this year that fledged babies. It was “NOISY,” but fun to watch. Don’t be hard on blue jays as they are enjoyable to watch, and even if they scare your other birds from the feeders, they don’t hang out long and the other birds return quickly. Sometimes we have to love all the species to enjoy a few!  
They love black oil sunflower, suet nuggets (WBU Bark Butter Suet nuggets specifically), peanuts in and out of the shell, tree nuts and cracked corn.
Stop in and see us at Wild Birds Unlimited, 9348 State Hwy 16, Suite 14, Onalaska, WI 54650, 608-781-5088.
Happy Birding!
Karen Perry