Re: Yellow-headed Blackbird at Crissy Field (19 August)
Hi Ken -toggle quoted messageShow quoted text
I believe so on young male. The amount of yellow in the head is greater
than most young females and the amount of white tipping to the primary
coverts is better for young male than either age of female. Size also can
be useful - most male YHBL should appear bigger than male Brewer's whereas
most females should be smaller.