'Ulili Wandering Tattler Reproduction

The 'Ulili leave Hawaii for their Arctic breeding grounds in April. They breed in Northern Siberia, Alaska, and Northern British Columbia. Monogamous, the 'Ulili mate with only one partner during the season.

Their breeding plumage emerges after the spring and summer molting season. Their upperparts are gray, underparts are heavily barred with gray and white.

The 'Ulili's nest is a collection of gravel and pebbles in a hollow in the ground. The nest is sometimes filled with twigs and roots.

On the average, four eggs are laid and incubated for 23-25 days. Both parents tend the nest. Chicks are cared for by both parents until they are ready to fledge, or fly. The young 'Ulili''s plumage is pale gray on its upperparts.