. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 328 Bulletin Mu6ciim of Comparative Zoology, Vol. 148, No. 7. Figure 3. Northern races of A. albinucha. stead of voice signals, is a means of keep- ing members of a family gionp together, or whether the noise is merely an aerodynamic byproduct with no special significance. Skutch (1967) saw the species feeding on berries of Fuchsia arhorescens. This seems to be the only specific record of its diet but because the bird is often heard foraging in the forest litter, it may be as- sumed to be omnivorous. Skutch (1967) sur
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 328 Bulletin Mu6ciim of Comparative Zoology, Vol. 148, No. 7. Figure 3. Northern races of A. albinucha. stead of voice signals, is a means of keep- ing members of a family gionp together, or whether the noise is merely an aerodynamic byproduct with no special significance. Skutch (1967) saw the species feeding on berries of Fuchsia arhorescens. This seems to be the only specific record of its diet but because the bird is often heard foraging in the forest litter, it may be as- sumed to be omnivorous. Skutch (1967) surmises that the bird turns the litter with its bill, although apparently no one has yet seen this behavior. A. albinucha builds a bulky, open nest in weeds close to or on the ground or in dense tangles a meter or two above it (Cherrie, 1892; Blake, 1956; Skutch, 1967). Two or three white or pale blue eggs are laid, and at least some white eggs turn pale blue when their contents are removed (Cherrie, 1892). The nests are frequently parasitized l)v Muluthrus aeneus (Cherrie, 1892; Slud, 1964). The breeding season is poorly known. In Middle America, it appears to be from April through June or even late Julv (Cherrie, 1892; Blake, 1958; Paynter, 1957; Skutch, 1967); in Colombia, March and April dates are recorded (Miller, 1963). The call is said to be a faint high-pitched (Edwards, 1972) or sst, sr, or tsr (Slud, 1964), and its song is described as a weak "squeaky pully" sound with descending churrs (Slud, 1964) on a thin slow "O see me, O see, I'm weary, pity me" (Skutch, 1967). Morphulooical variation.—There is minor sexual dimorphism in size, with the male's wing and tail averaging slightly longer and the bill minutely longer. No geographical variation in these characters is apparent. There is very little variation in the color. Please note that these images are extracted from scanned page images that may have been digitally enhanced for read
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
