A new United Nations report says that almost half of the world's migratory animals are in decline and that many birds and fish are at risk of extinction.

A new United Nations report says that almost half of the world's migratory animals are in decline and that many birds and fish are at risk of extinction.

Scientists are warning the spring bird migration could give a new avian flu strain a chance to spread. Migrating birds could pose a risk to animals, so veterinarians recommend pet owners keep their animals away from birds where possible.