Warbling vireo Vireo gilvus

Identification Tips:

• Length: 4.75 inches
• Thick bill with hooked upper mandible
• Sexes similar
• Brown eye
• White supercilium
• Pale lores
• Gray or olive-gray head, back, wings, and tail
• White underparts
• No wing bars
• May have pale yellow wash on belly or flanks
• Blue-gray legs
• Juvenile may have yellowish flanks or belly in fall and a faint buff wing bar

  Similar Species:

  The Red-eyed Vireo complex (Red-eyed, Black-whiskered, Yellow-green) has an olive-green back color and a contrasting gray crown, a bold white supercilium offset by black stripes above and below, and red eyes as adults. Philadelphia Vireo has dark lores and pale yellow throat and breast. All other vireos have wing bars. Tennessee Warbler has similar, though more olive, plumage, but is smaller and has a thin, pointed bill.

  Length and wingspan from: Robbins, C.S., Bruun, B., Zim, H.S., (1966). Birds of North America. New York: Western Publishing Company, Inc.

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