Corvids, no surprise—with ravens and crows as the clear outliers—along with parrots. Then came grackles, raptors (especially falcons and hawks), woodpeckers, hornbills, gulls, kingfishers, roadrunners, and herons. (Owls were excluded from the search because they are nocturnal and their innovations are rarely observed directly, but rather inferred from fecal evidence.) Also high on the totem pole were birds in the sparrow and tit families. Among those at the low end were quails, ostriches, bustards, turkeys, and nightjars.
Wow, kinda surprising about ostriches being at the low end of the scale.
Beep-Beep the Roadrunner would be proud of his species’ ranking though. ;-)
