Photo courtesy of Greg Lavaty

Yellow Warbler

Dendroica petechia
Order: Passeriformes
Family: Parulidae
Listen:
Sound courtesy of Cornell Lab of Ornithology

Did you know?

Unlike many other migratory warblers, Yellow Warblers generally do not use dense forest habitat for breeding or wintering. Nonetheless, this warbler's breeding population in North America declined sharply in the last decade (1997-2007).

Back to top

General Description

The male Yellow Warbler is a small bright yellow bird with rusty streaks on its breast and belly, and black eyes that contrast with the relatively unmarked yellow face. The females and immature birds are duller than the male, and their streaks may be pale or absent. To attract females for mating, males sing a distinctive song that has been described as a melodious whistle, sounding like "sweet, sweet, sweet, I'm so sweet."

The female builds the nest, incubates the eggs, and feeds the hatchlings. As the young grow and leave the nest, the male joins in feeding them. Brown-headed Cowbirds lay eggs in the nests of other songbirds, often reducing the breeding success of the host. Unlike most other warblers, Yellow Warblers sometimes detect the foreign egg and respond by building another nest above the first one, where the female warbler lays new eggs. The cowbird egg is not brooded and does not hatch. Visit BirdWeb to learn more about this bird.

The Yellow Warbler is a widespread bird with many distinct subspeciesA taxonomic division of a species with its own unique characteristics.
More.... This profile focuses on the group of subspecies collectively called Yellow Warbler, which breeds in North America and migrates south for the winter. Other subspecies groups are known as the Mangrove Warbler and the Golden Warbler; these two groups are NeotropicalA tropical region south of the Tropic of Cancer in the western hemisphere, including southern Mexico, Central and South America.
More... residents native to Florida, Mexico, Central America, and South America, and they do not migrate. The migratory Yellow Warblers can be distinguished from the resident Mangrove and Golden Warblers by their differing feather color patterns.

Back to top

Habitat & Migration

For breeding, Yellow Warblers prefer moist brushy habitats along streams and rivers called riparianMoist habitats with trees and shrubs along streams and rivers.
More... areas - the kind of habitat where willows, alders, and aspens thrive. The birds also breed in other moist areas, including the edges of swamps and leafy bogs, as well as forest edges. In drier areas, this warbler favors thickets, orchards, and suburban gardens. The birds breed throughout most of the United States and Canada, ranging from Alaska to central Mexico. They eat insects, especially caterpillars, that they find on leaves and small twigs. In addition, these warblers perch on exposed twigs or small branches from which they fly out to catch nearby airborne insects, a behavior commonly seen in flycatchers.

Migratory Yellow Warblers winter on the coasts of Mexico, throughout Central America, and in northern South America, largely east of the AndesThe South American mountain chain that runs parallel to the continent's west coast.
More.... Riparian areas are also an important winter habitat for Yellow Warblers. In a study in Chiapas, Mexico, Yellow Warblers were one of the birds most commonly seen in streamside vegetation. During their northward migration to their breeding grounds, most Yellow Warblers fly up the coast of Mexico and Texas and across the western part of the Gulf of Mexico, while some may fly north from the Yucatan Peninsula to the Gulf states.

Back to top

The Coffee Connection

On coffee plantations as in other habitat, the Yellow Warbler prefers partially shaded habitat, but it is not generally found in dense forests or areas with heavy shade. In Guatemala, male Yellow Warblers were found using sun coffeeCoffee grown without the cover of a forest canopy or planted shade. This usually requires intense management and chemical inputs.
More... habitat, where they foraged in scarce trees and aggressively defended small territories. These territories were based around isolated trees, which harbored more insects than the coffee plants; Yellow Warblers successfully defended these resources from other migratory birds like Magnolia Warblers and Wilson's Warblers in a type of territoriality rarely seen in nonbreeding habitat. Yellow Warblers wintering in Guatamala were also found using some managed shade coffee plantations dominated by GliricidiaFlowering, deciduous tropical trees used to provide shade in coffee plantations. Some shade coffee birds use Gliricidia flowers and nectar.
More... trees, but not others dominated by IngaFlowering tropical trees commonly used to provide shade in coffee plantations. Some shade coffee birds use Inga flowers and nectar.
More... trees. However, these birds are occasionally seen on rusticThe coffee-growing system in which the original tree layer is left intact and coffee bushes replace the original undergrowth.
More... coffee farms that have a dense natural tree canopy and on other shade coffee plantations. In a study of birds in various disturbed and native habitats in the Yucatan Peninsula, Yellow Warblers were detected in fields and pastures, and in shrubby areas with young trees, but not in mature semi-evergreen forests. These authors found that migratory bird species such as the Yellow Warbler, which do not breed in dense forests, also do not use them at other times.

Back to top

Conservation Status

The International Union for Conservation of NatureA global environment network which publishes a "Red List" indicating the conservation status of plants and animals. Status on the “Red List” increases from Least Concern to Near Threatened to Vulnerable to Endangered to Critically Endangered.
More... (IUCN) lists the global conservation status of the Yellow Warbler as "Least Concern." Although the Yellow Warbler is a common bird, its population has declined considerably in the past decade (1997-2007), according to the North American Breeding Bird Survey. The same survey reported that the Yellow Warbler population had been increasing in prior years (1966-1996). This recent decline has been uneven in the United States, showing a sharp drop in the Southeast but slight increases in the Midwest and states further west, including Montana, Utah, Colorado, and Nebraska. Maintaining this bird's population may require preservation of its wooded streamside habitats.

Back to top