It's about that time of year for Oklahomans to spot monarch butterflies, the orange-and-black-winged insect known for their twice-yearly migrations across the continent as they pass through the state ...

It's a bit early to start seeing hummingbirds in New York, but they have begun their spring migration into the southern U.S. states and will continue to make their way north over the next few months.

When we were kids we all learned that birds fly south for winter. Even though it was probably one of the first fascinating facts you learned about birds, it’s not entirely true. Bird migration ...