Date: 1/31/17 6:28 am From: Leslie Linehan <linehanla...> Subject: [texbirds] molt timing in Selasphorus hummingbirds?
Does anyone know if the timing of molt from immature to adult is different for Allen's vs Rufous Hummingbirds? I have an immature Selasphorus that I strongly suspect is an Allen's. I've had really good looks at his tail, but have not been able to capture a diagnostic photo.
About two weeks ago, he began to acquire wing whistle. Over the course of several days, it developed into a sound that is subtly different than Rufous-slightly higher pitched, more musical, and not as loud in volume as a typical male Rufous. He now has acquired almost all of his adult gorget feathers. It seems to me that this is early compared to immature Rufous that I have had overwinter. In fact, most of my immature male Rufous-types, identified by red back feathers, have departed before acquiring their full adult plumage.
I'm just wondering if molt timing could confirm an individual bird's identity.