can you compost bird nests?
Yes — an abandoned nest is twigs, grass, and mud, a ready-made brown. Just make sure it's genuinely empty before you touch it.
breaks down in 4–8 months once pulled apart
C:N ≈ 60:1
which bins can take it?
- hot pile yes
- cold pile yes
- worm bin caution
- bokashi no
- tumbler yes
- curbside yes
- worm bin: Fine in small shredded amounts, but nest mites and the odd unhatched egg are unwelcome in an indoor bin.
why?
Nests are built from the same dry stems, rootlets, and bark strips that make up any woody brown, held together with mud and saliva that crumbles once wet. Because a bird packs that material tightly, a nest tossed in whole sheds rain like a thatched roof — pulling it apart is what lets microbes in. Old nests also host mites and lice that die off in a heating pile.
how to prep it
- Confirm the nest is empty and the season is over before removing it
- Break the nest apart into loose material
- Pick out string, plastic ribbon, and fishing line woven into it
watch out for
- The Migratory Bird Treaty Act covers the nests and eggs of native species while they are in use; taking down an active nest is illegal, and some birds return to the same one for years.
- Wear gloves and avoid breathing dust from an old nest — accumulated droppings can hold fungal spores, and nest mites will wander onto your hands.
- Nests full of synthetic twine or dryer lint are common in suburbs; that material needs to come out before composting.
often confused with
- Wasp and hornet nests — Paper wasp nests are chewed wood pulp and compost just as well — but only once the colony is confirmed dead and gone.
quick answers
When is it safe to clear out old nests?
Late fall through winter, after nesting season ends in your region. Cleaning nest boxes then is standard practice and encourages reuse in spring, since some birds avoid a box packed with last year's material.
What about the nest material inside a birdhouse?
Same answer — scrape it into the pile and scrub the box with a dilute bleach solution, rinsing well. Don't compost anything you scraped out after using disinfectant on it.