Remsen, J.V. 1975 Blackburnian Warbler Dendroica fusca Sep. 12 Briggsdale, Weld Co., Colorado: 1 in (? or NBP ?) foraging rapidly in grove of trees at Crow Valley Park. At first thought to be a Townsend's (much closer resemblance than I'd anticipated), suspicion was aroused by the slight orange shading to the yellow chest and complete lack of any dark smudging across chest (only speckles on sides and flanks) Sep. 13 Horse Creek Res., Adams Co., Colo: 1 (? or NBP ?) foraging rapidly in upper storey of cottonwoods along W. shore of reservoir. Seen very well several times - pale 'V' on back, bright yellow throat and breast, two white wingbars, cheek patch, pale center to crown, spots on sides.