Observations on the occurrence of red‐orange female common crossbills Loxia curvirostra

Publication Type:Journal Article
Year of Publication:1994
Authors:JARDINE, DAVIDC
Journal:Ringing & Migration
Volume:15
Issue:2
Date Published:1994
ISBN Number:0307-8698
Keywords:Fringillidae, Loxia, Loxia curvirostra
Abstract:A ringing programme of Common Crossbills Loxia curvirostra in Kielder Forest in 1991 found that 6.5% of females had orange?red feathers in their plumage, a feature normally ascribed only to male birds. The colour of the throat feathers was further investigated in museum skins and confirmed as a better determinant of sex in this species. Birds with red, yellow or orange throats should be sexed as males; those with grey or olive?grey throats as females.A ringing programme of Common Crossbills Loxia curvirostra in Kielder Forest in 1991 found that 6.5% of females had orange?red feathers in their plumage, a feature normally ascribed only to male birds. The colour of the throat feathers was further investigated in museum skins and confirmed as a better determinant of sex in this species. Birds with red, yellow or orange throats should be sexed as males; those with grey or olive?grey throats as females.
URL:http://dx.doi.org/10.1080/03078698.1994.9674080
Short Title:Ringing & Migration
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith