(1) For both species, body size traits (in mm) included mean tarsus length, mean flattened wing chord, tail length, and culmen length (base of cere to tip of beak).(2) They have large dark eyes and yellow to orange legs, cere , and eye-rings.(3) Falconids are medium-sized to large birds of prey (wingspan 55 to more than 125 cm, weight 28 to 2100 g), typically with hooked beaks, large brown eyes and a yellow cere , eyerings and feet.(4) The falconids resemble the accipitrids in some characteristics, such as a powerful hooked bill, a fleshy cere straddling the bill, heavy bony brow ridges, and a crop (to store freshly eaten food).(5) Exposed skin of the ceres , dewlaps, horns, bills or legs may be brightly colored red or blue.
