Geothlypis trichas
Plate — illustration to come
Summer breederNative · New Jersey

Common Yellowthroat

Geothlypis trichas

Parulidae

The only warbler in New Jersey that nests in open marshes — you can find them in cattail wetlands, wet thickets, briar tangles, and overgrown fields. Males wear a broad black mask across the face bordered above with white — the 'Lone Ranger' look. One of the most widespread breeding warblers in the state.

Arrives from Central America and the Caribbean in April; departs by October.

Identify by

How to spot one.

  • 4.5–5 inches

  • Male: bright yellow throat and chest, olive-green back, striking black mask edged in white

  • Female: olive-brown overall, pale throat, no mask, buff undertail

  • Skulks low in dense vegetation

  • Often heard before seen

Voice

What it sounds like.

A bright, distinct 'wichity-wichity-wichity-wich' — easy to learn and unmistakable once you know it.

Life & behavior

How it lives.

Skulker — stays low in dense vegetation. Builds cup nests hidden in tangled marsh grass or low shrubs. Hops through vegetation gleaning insects; occasionally hovers to snatch prey.

At a glance

The spec sheet.

Status
Summer breeder
Size
4.3–5.1 inches
Present in NJ
April – October
Native to NJ
Yes
Conservation status
stable
Family
Parulidae
Diet

What it eats.

Diet often shifts dramatically between breeding season and the rest of the year — especially for insectivorous birds that pivot to native berries in fall and winter.

Summer / breeding season

  • Grasshoppers, dragonflies, damselflies

  • Beetles, caterpillars, moths, flies

  • Ants, leafhoppers, spiders

  • Some seeds and berries late in season

Fall / winter

  • Migrates to Central America and the Caribbean

  • Overwintering diet: insects, spiders, some seeds

Plants it uses

What it needs.

Native plants that feed this bird or provide shelter. Names in hydrangea link to the plant’s Field Guide entry.

  • Cattail marshes, wet thickets

    Cover / habitat

  • Native grasses and sedges

    Cover / habitat

  • Buttonbush

    Cover / habitat

  • Briar tangles, overgrown edges

    Cover / habitat

Sources

Audubon Field Guide · All About Birds (Cornell)