Iris coloration and a case of temporary heterochromia in the Red-bellied Grackle (Hypopyrrhus pyrohypogaster): Coloración del iris y un caso de heterocromía temporal en el Cacique Candela (Hypopyrrhus pyrohypogaster)

Santiago  David; Jenny M.  Muñoz; David  Ocampo; M. Camila  Estrada; Andrés M.  Cuervo

Autores/as

Santiago David Instituto de Biología, Universidad de Antioquia
Jenny M. Muñoz Instituto de Biología, Universidad de Antioquia
David Ocampo Instituto de Biología, Universidad de Antioquia
M. Camila Estrada Instituto de Biología, Universidad de Antioquia
Andrés M. Cuervo Department of Biological Sciences and Museum of Natural Science, Louisiana State University

Palabras clave:

Antioquia, heterochromia iridis, Hypopyrrhus pyrohypogaster, iris coloration

Resumen

We describe overlooked patterns and age-related variation in the iris coloration of the Red-bellied Grackle (Hypopyrrhus pyrohypogaster), a range-restricted threatened species of the Colombian Andes. Whereas adults exhibit a bicolored pale-yellow/scarlet red iris, juveniles show a dark iris, ranging from dark brown to grayish brown. In addition, we report the first case for a Neotropical species of temporary heterochromia iridis, an uncommon phenomenon in birds, from recaptures of a female, Red-bellied Grackle in 2010. Our observations suggest that this case of heterochromia may be related to stress and changes in blood flow to the eye.

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