|A Cooper's or Sharp-shinned Hawk taken in Mission Viejo. Photo by J.J. Meyer|
There are other reasons why birds may be avoiding your feeders. Birds are persnickety and will refuse old, wet or moldy seed. Be sure to clean your feeders with a 10 percent bleach solution at least once a month and replace old seed. See "Clean feeders keep birds coming back" listed under my Register columns.
Another reason your feeders may be empty is that birds such as American Goldfinches roam widely in flocks in search of food and have been recorded moving more than four miles between multiple feeding stations in a single day. The good news is that the birds will eventually return.