Prothonotary Warbler

The Prothonotary Warbler is a striking bird with a bright golden-yellow head and underparts. Its wings are gray, back is greenish, and it has white undertail coverts. The bird's black eyes and bill contrast sharply with its vibrant plumage, and white patches on its tail are visible during flight.

Males are more brightly colored than females. Females have a duller yellow head and underparts, with a greenish wash on the crown and nape, and more olive-gray on the back. Juveniles resemble females but are even duller in coloration and have more pointed tail feathers.

The Prothonotary Warbler's song is a loud, ringing series of 'sweet' notes, often described as 'sweet-sweet-sweet-sweet'. The song carries well through their swampy habitats.

Their call is a sharp, metallic 'chip' or 'tink'. During courtship, males may sing up to 15 times per minute.

• Look for them in flooded forests and swamps, especially near water
• Listen for their loud, ringing 'sweet-sweet-sweet' song
• Observe tree cavities and nest boxes in wetland areas during the breeding season
• In the US, visit wildlife refuges along major rivers in the Southeast during summer

Prothonotary Warblers primarily feed on insects and other small invertebrates. They glean prey from leaves and bark, often hovering to snatch insects from the undersides of foliage.

Their diet includes caterpillars, flies, beetles, and aquatic insects. They occasionally supplement their diet with small snails and seeds.

Breeding season for Prothonotary Warblers typically begins in April. Males arrive at breeding grounds first and establish territories, attracting females with their bright plumage and persistent singing.

Unlike most warblers, they nest in tree cavities or nest boxes, usually over or near water. Females construct cup-shaped nests using moss, leaves, and bark. They typically lay 4-6 white or cream-colored eggs with brown speckles.

Incubation lasts about 12-14 days, primarily done by the female. Both parents feed the nestlings, which fledge after 10-11 days. Pairs often raise two broods per season in the southern parts of their range.

Prothonotary Warblers are active foragers, often seen hopping along branches or probing bark for insects. They have a unique habit among warblers of nesting in tree cavities over water.

These birds are generally solitary outside of breeding season but may join mixed-species flocks during migration.

While currently listed as Least Concern, Prothonotary Warblers face threats from habitat loss, particularly the destruction of bottomland hardwood forests.

Conservation efforts focus on protecting and restoring wetland habitats, as well as providing nest boxes in suitable areas to support breeding populations.