But since then, as green jays have pushed north and blue jays have pushed west, their ranges have converged around San Antonio. As a Ph.D. candidate studying green jays in Texas, Stokes was in the habit of monitoring several social media sites where birders share photos of their sightings. It was vaguely like a blue jay, but clearly different. “If it had gone two houses down, probably it would have never been reported anywhere.”According to the study, the bird is a male hybrid offspring of a green jay mother and a blue jay father. That makes it like another hybrid that researchers in the 1970s brought into being by crossing a green jay and a blue jay in captivity.