U.S. Fish and Wildlife Service

The Upper Mississippi River National Wildlife and Fish Refuge is the core of a major flyway for migrating birds and one of the most visited refuges in the U.S. Anglers and outdoor enthusiasts saved it from being drained 100 years ago, but the next century brings new challenges.

The U.S. Fish and Wildlife Service announced it would seek protections for the regal fritillary, a large non-migratory butterfly with orange and black markings. It's suffering from habitat loss in Missouri and Kansas because of development, pesticides and climate change.

Brush Creek is stinky, dirty and poorly maintained. Can Kansas City turn it into an attraction? Plus: Ranchers across the Midwest and Great Plains are battling black vultures that prey on newborn livestock.

Ranchers across the Midwest are battling black vultures, a federally protected bird that has a reputation for killing newborn livestock. While the birds play a major ecological role, their expanding population is becoming a big nuisance for producers.