ISLE ROYALE, MI – Raven numbers are dropping on Michigan’s remote Isle Royale, and the reason has a lot to do with wolves.National Park staff who oversee the island archipelago sitting 60 miles from the Upper Peninsula mainland say the clever birds’ decline in numbers is linked to the steep drop in the island’s wolves in recent years.Ravens typically eat a good portion of what the wolves kill for food. And fewer wolves mean fewer kills and fewer chances for ravens to swoop in and enjoy the free buffet.

Source: Why ravens are disappearing from this Michigan island | MLive.com