The Madagascar serpent eagle (Eutriorchis astur) is a species of bird of prey in the family Accipitridae.

[4] This bird inhabits dense, humid, and broadleafed evergreen forests in northeastern and east-central Madagascar.

[5] This species is threatened by the destruction of its specialized habitat and a presumed low rate of reproduction.

Triorchis is a Latinization (Pliny the Elder)[6] of Greek triórkhēs (τριόρχης), which Aristotle and Theophrastus used for a kind of hawk, possibly the common buzzard.

[7] This erroneous bit of anatomy has been connected with the ease of mistaking a bird's adrenal gland for a testicle.