"The jays rub ants on their feathers draining the of formic acid before they gobble them up. are aggressive in competition for nests other small birds. They take eggs and sometimes even birds depending sizes. hey weigh about 5 grams hatching but when fly 20 days later 60 The black bands that appear faces napes throats called “bridles” distinct each bird. Blue Jays aren’t actually blue. In fact pigment feathers is brown. Scattering light structural parts causes us to see blue coloration."