NEW ORLEANS — Louisiana's state wildlife veterinarian says at least some of an estimated 450 birds that died near Baton Rouge may have flown into a power line.

Jim LaCour said Tuesday the grackles, starlings, brown-headed cowbirds and red-winged blackbirds had broken beaks and backs. He says some live birds had broken wings but ran too fast to catch.

The bird deaths Monday came a few days after about 3,000 blackbirds fell from the sky in central Arkansas. Scientists there say celebratory fireworks on New Year's Eve likely sent the birds into such a tizzy that they crashed into homes, cars and each other before plummeting to their deaths.

Officials say such massive wildlife kills are not uncommon.