Cooperative Roles in Mixed Flocks of Antwrens (Formicariidae)

@article{Wiley1971CooperativeRI,
  title={Cooperative Roles in Mixed Flocks of Antwrens (Formicariidae)},
  author={R. Haven Wiley},
  journal={The Auk},
  year={1971},
  volume={88},
  pages={881-892}
}
  • R. Wiley
  • Published 1 October 1971
  • Biology
  • The Auk
Ecology and behavior predict an evolutionary trade‐off between song complexity and elaborate plumages in antwrens (Aves, Thamnophilidae)
TLDR
The idea that environmental (sensory drive) and behavioral pressures (social selection) shape signal evolution in antwrens supports the idea that natural and social selection play an important role in the evolution of sexual dimorphism.
Systematics of a Neotropical clade of dead-leaf foraging antwrens (Aves: Thamnophilidae; Epinecrophylla).
TLDR
This work employs massively parallel sequencing of thousands of ultraconserved elements to provide both the most comprehensive subspecies-level phylogeny of Epinecrophylla antwrens and the first population-level genetic analyses for most species in the genus.
Systematics of a radiation of Neotropical suboscines (Aves: Thamnophilidae: Epinecrophylla)
TLDR
This work employs massively parallel sequencing of thousands of ultraconserved elements to provide both the most comprehensive subspecies-level phylogeny of Epinecrophylla antwrens and the first population-level genetic analyses for most species in the genus.
Nesting and natural history of the Plain-winged Woodcreeper (Dendrocincla turdina): foraging associations and uniparental care
TLDR
Uniparental care is unusual in forest insectivores but has arisen at least twice in Dendrocolaptinae and seems to be associated with hiding of eggs, secretive behavior, and slow nestling growth.
Using foraging ecology to elucidate the role of species interactions in two contrasting mixed-species flock systems in northeastern Peru
TLDR
Foraging behavior in two different flock types is used to interpret the extent to which core species minimize niche overlap to reflect negative interactions and to show that alarm-calling species in different sites show different patterns of association with other flocking species.
Observations of mixed-species bird flocks at Kichwa Tembo Camp, Kenya
TLDR
Most of the birds observed in mixed-species flocks in this study were opportunistic attendant species, including the African Pygmy-Kingfisher Ispidina picta, not previously described as joining mixed- species flocks.
Multispecies antbird societies in lowland forests of Surinam and Ecuador: stable membership and foraging differences
TLDR
Flocks of insectivorous birds in the understory of lowland wet forest in Surinam and eastern Ecuador regularly included two species of antshrikes and four species of antwrens in the genus Myrmotherula, achieving an unusual degree of cohesiveness and integration of foraging specialities in comparison with other mixed aggregation of animals.
ASPECTS OF THE BEHAVIOUR AND ECOLOGY OF MIXED‐SPECIES BIRD FLOCKS IN KASHMIR
TLDR
While different species may derive different benefits from joining these flocks, advantages that could benefit some or all participants include the receipt of information on good feeding areas in an unfamiliar locality, the avoidance of time wasted on feeding on substrates which have been very recently harvested, and enhanced safety from predators.
THE COMPOSITION AND BEHAVIOUR OF SOME MIXED‐SPECIES BIRD FLOCKS IN SARAWAK
TLDR
The existence of mixed-species flocks of birds feeding on insects were observed mainly in forest in Sarawak at a time of year when insect availability is known to be near its annual minimum, interpreted primarily as an adaptation for augmenting available insect food by flushing insects as a result of the foraging activities of flock members.
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Mixed—species flocks of birds composed of chickadees, titmice, woodpeckers, nuthatches, creepers, kinglets, and wood warblers were studied in several habitats in Louisiana, Maryland, and Maine and appear to be an effective adaptation to difficult conditions.
SOCIAL MIMICRY; CHARACTER CONVERGENCE VERSUS CHARACTER DISPLACEMENT
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Mixed species flocks of birds have received renewed attention in recent years. Short (1961) emphasized rightly that two different questions have been asked about mixed flocks. He suggested that
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When Plain—brown Woodcreepers follow swarms of army ants on Barro Colorado Island, Panama Canal Zone, they forage in the zone near the ground more frequently when Ocellated Antthrushes are absent, a clear example of competitive exclusion by dominance.
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TLDR
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F ORAGING bird flocks containing several to many species are frequent during the non-breeding period in most of the world. I observed such flocks while participating in a Cornell University field
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