Are the attached photos of an immature female Calliope Hummingbird? They were taken August 1st at the Boulder Community Gardens in north-central Boulder. The bird was noticeably very much smaller than the many Broad-taileds. It seemed closer in size to a large bee than to an adult Broad-tailed.
My hesitancy: Sibley shows immature Calliopes as having a thin white strip above the gape, which this bird doesn't show. The overall size was very tiny and the tail is shorter than the folder wings. Could this just be a slow-growing, small Broad-tailed with a short tail?
Thanks,
Richard Trinkner
Boulder
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