Let's consider two examples, sighting reports of flying dino . . . pterosaurs.
Flying Creature in San Fernando Valley, California
" . . . flying creature in Sherman Oaks, California, suggests similarities to the ropen of Papua New Guinea. . . . at about 10:30 p.m., on September 21, 2009 . . . very large, winged creature that was gliding maybe 100 yards [above the two eyewitnesses] . . . the wingspan: ten to fifteen feet; the girlfriend estimated twenty feet. The wings appeared more like those of bats than birds, with a greater depth from leading-edge to trailing edge."Living Pterosaur in Ohio
“A young man was reported to have seen something strange flying over the Maumee River in the summer of 2003.; he described it like a pterosaur, according to a recently-published book, Live Pterosaurs in America. It was reported to be chasing sparrows as it flew over the Route 49 bridge near Antwerp, Ohio.”