Bird flu has killed at least four snowy owls in Massachusetts in recent weeks, adding the graceful white and black-patterned predators to its victims as it sweeps through the wild bird population.

A seal at a Massachusetts zoo died this month after contracting bird flu. Blue, the Buttonwood Park Zoo’s beloved 21-year-old harbor seal, died due to complications from Highly Pathogenic Avian Influenza, or bird flu , officials at the New Bedford zoo said Wednesday.

The bird flu is taking out wildlife in some parts of Indiana. Birds known as the sandhill cranes are turning up dead on frozen lakes in LaPorte County, Indiana. Sign up for our Newsletters Around 600 cranes have died in Jackson County,

There is no cure for the disease, which has a high mortality rate among birds but remains a low risk to people, according to the CDC