According to the Cornell Lab of Ornithology found at: http://www.birds.cornell.edu/AllAboutBirds/BirdGuide/Blue_Jay.html , blue jay numbers have been decreasing in the east. That is too bad because bluejays are really great birds. They are actually songbirds and sing quite beautifully. They are also known to squawk and raise a fuss when danger is present.
Raise a fuss is just what some grown blue jays did this past summer in my backyard. A baby bluejay somehow left its nest too early. Jimmy and I had a heck of time 'rescuing' it. The parents kept dive bombing us, and a bluejay is not a bird you want to run into as they are quite large. We did the prudent thing and retreated to the house to let the parents care for and watch over the baby. I am not even sure if the dogs would have stood up to these parents.
Bluejays eat a variety of insects which is a big help to gardeners. I have also seen them eating dogfood. I used to keep a bowl of dogfood on the deck and I can tell you more birds eat dogfood than you would believe. In addition to the bluejays, titmouses seemed to find the dogfood quite tasty. Maybe it has to do with the protein in the dogfood. Now, along with sunflower seeds I throw out a handful of dogfood when the weather is very cold and I want to feed the birds-especially the bluejays.
in the garden....