Thanks for the update. One less thing to worry about. They are
fascinating birds.
On Monday, July 1, 2019 at 6:52:40 AM UTC-4, Erik Hendrickson wrote:
>
> I believe this is consistant with obervations of Black Swifts at Black
> Canyon from 1996-2017, as reported in "Breeding Phenology
I believe this is consistant with obervations of Black Swifts at Black
Canyon from 1996-2017, as reported in "Breeding Phenology and Success of
Black Swifts in Box Canyon, Ouray, Colorado" in the Wilson Journal of
Ornithology, Vol. 119, No. 4, pgs. 678-685, 2007 by Sue E. Hirshman,
Carolyn
