An organism or anatomical structure with two digits, toes, or finger-like appendages.
From bi- (two) + dactyl (from Greek daktylos, finger or toe). Used in zoology and paleontology to describe creatures or fossils with two-digit limbs.
Ostriches and emus are bidactyl—they have just two toes on each foot instead of the typical avian three—and this extreme specialization makes them built for pure speed running, not perching like most birds.
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