Migration alert in effect for Chicago, with thousands of birds filling the skies

A significant number of birds are expected to travel through the Chicago area on Tuesday night, prompting a migration alert. Birdcast, a website dedicated to tracking migrating birds and predicting migration patterns, reported more than 28,000 birds will be in the skies per square kilometer throughout the night. According to experts, the greatest traffic times for migrating birds typically occur between 11 p.m. and 6 a.m., when hundreds of...