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Related Experiment Video

Updated: Jul 2, 2026

Assessing Species-specific Contributions To Craniofacial Development Using Quail-duck Chimeras
09:38

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Developmental abnormalities in two British falcons (Falco spp).

J E Cooper1

  • 1Department of Pathology, Royal College of Surgeons of England, London, England.

Avian Pathology : Journal of the W.V.P.A
|October 1, 1984
PubMed
Summary
This summary is machine-generated.

Developmental abnormalities, including extra digits and fused toes, were observed in a peregrine falcon and a merlin. These findings highlight rare congenital malformations in these raptor species.

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Area of Science:

  • Ornithology
  • Veterinary Medicine
  • Developmental Biology

Background:

  • Congenital malformations are rare in wild bird populations.
  • Understanding developmental abnormalities provides insights into genetic and environmental factors affecting avian development.

Purpose of the Study:

  • To document and describe novel developmental abnormalities in two species of falcons: the peregrine falcon (Falco peregrinus) and the merlin (Falco columbarius).
  • To contribute to the existing knowledge base on avian congenital anomalies.

Main Methods:

  • Gross morphological examination of two individual birds exhibiting abnormalities.
  • Detailed description of the specific malformations observed in each specimen.

Main Results:

  • A peregrine falcon (Falco peregrinus) presented with polydactyly (duplication of a hind toe) and extra vestigial digits on the carpus.
  • A merlin (Falco columbarius) exhibited syndactyly, characterized by the fusion of toes.

Conclusions:

  • The study reports unique cases of limb malformations in falcons, expanding the known spectrum of congenital abnormalities in these species.
  • These findings underscore the importance of continued surveillance for developmental anomalies in wild bird populations.