Summary
One color-banded black-capped chickadee flock was studied intensively at a winter feeder in Wisconsin. Flock structure was examined by measuring association among flock members in three ways: spatial proximity, temporal association, and association of individuals during flock movements. Additional information was obtained on aggressive interactions at and near the feeder. By midwinter, the strongest attachments were between males and females who subsequently mated; pair attachments strengthened as the breeding season approached. Lower ranked individuals in the dominance hierarchy showed weaker associations with other flock members in early spring than did more dominant individuals. The strong attachment to the mate may have implications for altruistic behavior within the winter flock.
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Ficken, M.S., Witkin, S.R. & Weise, C.M. Associations among members of a black-capped chickadee flock. Behav Ecol Sociobiol 8, 245–249 (1981). https://doi.org/10.1007/BF00299522
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DOI: https://doi.org/10.1007/BF00299522