Learn which materials are safe for birds building nests, and which can be harmful.

However, choosing the right materials can be confusing.

Holly Grantis a project assistant for NestWatch at the Cornell Lab of Ornithology.

Bird nest with three eggs

Credit:Mike Powles / Getty Images

The specific materials birds use vary by species, notes Grant.

The following natural fibers provide excellent nesting material for a variety of backyard birds, according to Grant.

Harmful Nesting Materials for Birds

There are many misconceptions about what nesting materials are safe for birds.

hummingbird perched on nest with babies

Credit: Edward Gohlich

The following materials should be avoided, as they can pose serious risks to delicate nestlings.

Time it right.Place materials out in the spring when birds begin building their nests, says Grant.

And some pesticides can also harm birds directly when they’re exposed.

garden with birdhouse and bench

Credit: Janet Loughrey