Genetics of Plumage Color in the Gyrfalcon (Falco rusticolus): Analysis of the Melanocortin-1 Receptor Gene has been published in the Journal of Heredity in July, 2012. Timing of breeding and offspring number covary with plumage colour among Gyrfalcons Falco rusticolus has been published in Ibis. Learn more about Wildlife Conservation at UNT by clicking here.