The hindlimb myology of Milvago chimango (Polyborinae, Falconidae)
Article first published online: 26 JUN 2013
Copyright © 2013 Wiley Periodicals, Inc.
Journal of Morphology
Volume 274, Issue 10, pages 1191–1201, October 2013
How to Cite
Mosto, M. C., Carril, J. and Picasso, M. B. J. (2013), The hindlimb myology of Milvago chimango (Polyborinae, Falconidae). J. Morphol., 274: 1191–1201. doi: 10.1002/jmor.20172
- Issue published online: 10 SEP 2013
- Article first published online: 26 JUN 2013
- Manuscript Accepted: 17 MAY 2013
- Manuscript Revised: 8 MAY 2013
- Manuscript Received: 13 JUL 2012
- bird of prey;
- terrestrial locomotion
We describe the hindlimb myology of Milvago chimango. This member of the Falconidae: Polyborinae is a generalist and opportunist that can jump and run down prey on the ground, unlike Falconinae that hunt birds in flight and kill them by striking with its talons. Due to differences in the locomotion habits between the subfamilies, we hypothesized differences in their hindlimb myology. Gross dissections showed that the myology of M. chimango is concordant with that described of other falconids, except for the following differences: the m. flexor cruris medialis has one belly with a longitudinal division; the m. iliotibialis lateralis does not have a connection with the m. iliofibularis; the m. fibularis longus is strongly aponeurotic; the m. tibialis cranialis lacks an accessory tendons and the m. flexor hallucis longus has one place of origin, instead of two. The presence of the m. flexor cruris lateralis can be distinguished as it has been described absent for the Falconidae. We associated its presence with the predominant terrestrial habit of the M. chimango. Each muscle dissected was weighed and the relationship between flexors and extensors at each joint was assessed. The extensor muscles predominated in all joints in M. chimango. Among the flexors, the m. flexor hallucis longus was the heaviest, which could be related to the importance of the use of its talons to obtain food. J. Morphol. 274:1191–1201, 2013. © 2013 Wiley Periodicals, Inc.