#birds #migration #buildings
McCormick Place, Chicago
Migrating birds crash into glass windows and die.
- Birds cannot perceive most glass as a barrier, and often strike glass windows that reflect the sky or nearby greenery. Most birds migrate at night using the stars to navigate, and are drawn to city lights in urban areas along their migratory flyways.

CHICAGO (CBS) -- Nearly 1,000 birds died Wednesday night after crashing into the windows at McCormick Place Lakeside Center, likely due to a combination of the convention center's bright lights and the rainy weather. The birds met their death while making their migratory journey south.