Could the local mosquito control efforts, particularly the spraying of pesticides for adult mosquitoes, be killing the birds?
Based on safety reports available from the EPA, many of the pesticides being used by local agencies for mosquito control are considered to have very low toxicity to birds.
This is a common problem. The bird sees the reflection and thinks it is another bird encroaching on his territory. One solution is to put a silhouette of a hawk in the window. That scares them off.
You can access the USGS Patuxent Wildlife Research Center's Bird Banding Laboratory. "How to Report a Bird Band" Call toll-free, 1-800-327-2263, from anywhere in Canada
The BBS is a cooperative effort between the U.S.
Because banding birds requires capturing the birds and handling them before the banding takes place, the banding of birds in the United States is controlled under the Migratory Bird Treaty Act