The falcons and caracaras are around 60 species of diurnal birds of prey that comprise the family Falconidae. The family's divided into two subfamiles, Polyborinae, which includes the caracaras and forest falcons, and Falconinae, the falcons, kestrels and falconets. Description Falcons and caracaras are small to medium sized birds of prey, ranging in size from the Black-thighed Falconet, which can weight as little as 35 g, to the Gyrfalcon, which can weigh as much as 1735 g. They've strongly ho… (More on Falconidae)