Chicago bird groups collecting hundreds of carcasses a day

By the numbers: This week, Chicago Bird Collision Monitors (CBCM) have picked up 100-200 birds a day in a 1.5-mile radius downtown, director Annette Prince tells Axios.

• CBCM received about 150 phone calls Tuesday from people who found bird carcasses in their neighborhoods, Prince says.
• They've experienced days with up to 2,000 birds.
• Hundreds of thousands of migratory birds pass through the Chicago at night during this season.

State of play: CBCM and other Chicago bird advocate groups have been petitioning the city to adopt an ordinance that requires new construction to consider bird safety in its design.

• "There are formulas that have been developed that you just plug in what kind of glass, how much glass you have, and you'll know how much of a threat your building or your window poses to a bird," Prince says.

Reality check: Prince and other advocates are hoping to draft the ordinance with alders, but there's currently nothing on the books.

What's next: If you come across a hurt and dead bird, you can call CBCM at 773-988-1867, and they can provide guidance on what to do next.

• Even reporting the deceased birds is helpful, Prince says, so the group has a record of the problem.