Yellow Warbler    Dendroica petechia

Migratory Status: Neotropical migrant

PIF Population Estimate: 39 000 000

Percent of western hemisphere population breeding in boreal forest: >25%

BAM Effective Detection Radius (m) : 66.54

PIF Maximum Detection Distance (m) : 125

Canadian BBS Population trend: -0.2 n.s. (-0.6 to 0.2)

Life History

Take a walk around a wetland thick with deciduous shrubs in the spring, and you’ll be sure to hear “sweet-sweet-sweet-I’m so sweet” - the song of the Yellow Warbler. As its name suggests, this bird is yellow overall in appearance. Breeding males are distinguished from other warbler species with yellow plumage by chestnut-red streaks on their chest and yellow tail spots. Females are similar in appearance to males, and may or may not have indistinct reddish streaking on their chest.

This species has the broadest distribution of any of the Dendroica warbler species. During the breeding season it can be found in early successional habitats and wetlands from northern Alaska east following the northern limit of shrub vegetation and throughout the boreal forest to Newfoundland. To the south, the Yellow Warbler’s breeding range extends well into the middle of the United States, and continues along the west coast into Mexico, Central America, northern parts of South America, as well as throughout Caribbean. The Yellow Warbler winters in Mexico, Lesser Antilles, and Central and South America.

Across their range, the morphology of individuals in Yellow Warbler populations varies considerably; therefore this species is currently divided into three subspecies groups. Two groups, the Golden Warbler (Petechia group) and the Mangrove Warbler (Erithachorides group), consist of resident populations occurring outside of North America; the third, Yellow Warbler (Aestiva group), consists of migratory populations found breeding across North America. Overall, 43 subspecies of Yellow Warblers are currently recognized.

Yellow Warblers are insectivores and use a variety of feeding methods such as gleaning, sallying, and hovering to capture prey. Males and females forage at different canopy heights, with males foraging higher in the canopy than females. Very little information is known about their feeding habitats in the non-breeding season. Like other warbler species, it is possible that fruit becomes more important in their diet during this time.

Reference(s)

Lowther, P. E., C. Celada, N. K. Klein, C. C. Rimmer, and D. A. Spector. 1999. Yellow Warbler (Dendroica petechia), The Birds of North America Online, . A. Poole, Ed. Ithaca: Cornell Laboratory of Ornithology; Retrieved from The Birds of North America Online database: http://bna.birds.cornell.edu/bna/species/454.