Anatomical Study on the Ostrich Foot Bones ( Struthio Camelus ) With a Special Reference to the Claw

The bones of the ostrich feet were formed by the distal extremity of the tarso-metatarsus bone, which had two articular surfaces (trochleae) for the articulation with two digits (III, IV). The first and second toes lacked. The third toe was larger than the fourth one and each consisted of four phalanges. The fourth toe was consisted of 4 phalanges with the absence of the claw. The distal phalanx of the third toe which was had a long tapering cone was enveloped completely in a keratinized long straight claw (dagger-shaped). The gross anatomical description was supported by images (x-rays and skeleton of the feet) and discussed in comparison with other birds species.