"Our" Kestrels (in Benicia, CA, in the San Francisco Bay Area) hatched around May 10th, and the adults have been regularly bringing food, etc. The chicks are now quite vocal, but are not yet peaking out of the box.
Earlier in the season there was competition for the box between two Kestrel pairs. I have not seen evidence of the second pair since well before the chicks hatched, but just now I saw two male Kestrels try to squeeze into the box at the same time and then fight each other. Does anyone have any comments/info about what might be going on? Will a second male kill this pair's chicks?