Monday through Wednesday the City of Rochester and USDA Wildlife Services will attempt to take care of the City's ongoing crow problem.
A roost of 20,000 to 30,000 crows have regularly settled in the downtown area for the winter. The biggest problem they've caused is big clean-up costs for the city, also parking problems and a small risk of spreading disease.
Wildlife biologists are using spotlights, flares, lasers and crow distress calls.
Scientists say none of the methods will harm the birds, but they are hoping to break up the roost and drive them out of town.
"Pretty much across most of the United States especially in the North," said Mark Carrara, USDA Wildlife Biologist. "They've discovered that urban environments are safe, positive places for them to be, we're not certain why. So we think we can do this in three nights and move them out and get some positive results and if we have to come back we will."
Public cooperation is appreciated. You can call 311 inside the city and 428-5990 outside city limits to report large groups of crows.
The phase will wrap on Wednesday around 7:30 p.m.