Hi
I would tend to agree with Nick's analysis for immature Black-chinned. Most young hummers have shorter bills than adult and male bills are shorter females, which may explain a discrepancy in bill length.
Bob Righter
Denver CO
Sent from my iPad
--
You received this message because you are subscribed to the Google Groups "Colorado Birds" group.
To post to this group, send email to cobirds@googlegroups.com.
To unsubscribe from this group, send email to cobirds+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
No comments:
Post a Comment