Pygmy Falcon predation of nestlings of their obligate host, the Sociable Weaver

  title={Pygmy Falcon predation of nestlings of their obligate host, the Sociable Weaver},
  author={Rita Covas and Onno Huyser and Claire Doutrelant},
  pages={325 - 326}
Rita Covas1,2*, Onno Huyser1,3 and Claire Doutrelant1,4 1 DST Centre of Excellence in Birds as Keys to Biodiversity Conservation at the Percy FitzPatrick Institute, University of Cape Town, Rondebosch 7701, South Africa 2 Present address: Institute of Cell, Animal and Population Biology, University of Edinburgh, King’s Buildings, West Mains Rd, EH8 9RB, Edinburgh, Scotland, United Kingdom 3 Present address: 2 River Close, Noordhoek, Cape Town, South Africa 4 Present address: CEFE–CNRS 1919 Rte… 

The Large Communal Nests of Sociable Weavers Provide Year-Round Insulated Refuge for Weavers and Pygmy Falcons

The primary role of nests as structural support for eggs, nestlings, and incubating parents is well established, but our understanding of their secondary roles and their adaptive features is still

Not so friendly neighbours: Pygmy Falcon eating Sociable Weaver nestling

Ornithological Observations accepts papers containing faunistic information about birds. This includes descriptions of distribution, behaviour, breeding, foraging, food, movement, measurements,

Winter thermoregulation in free-ranging pygmy falcons in the Kalahari Desert

  • Jess LundDiana Bolopo Andrew E. McKechnie
  • Environmental Science
    Journal of Ornithology
  • 2020
Among birds, pronounced heterothermy tends to be used by small species belonging to phylogenetically older taxa and inhabiting environments with unpredictable and/or seasonally scarce food resources.

Helpers in colonial cooperatively breeding sociable weavers Philetairus socius contribute to buffer the effects of adverse breeding conditions

The results illustrate that the effect of helpers might be detectable mostly under unfavourable conditions, but can contribute to improve reproductive performance in those situations.

Protective nesting association between the Barred Warbler Sylvia nisoria and the Red-backed Shrike Lanius collurio: an experiment using artificial and natural nests

  • M. Polak
  • Environmental Science, Biology
    Ecological Research
  • 2014
According to the predictions of the predator protection hypothesis the survival rates of the natural and artificial nests were significantly higher in territories of individuals breeding in the protective nesting association, and this type of interspecific positive interaction between two associate species can be classified as facultative mutualism.

The Role of Monk Parakeets as Nest-Site Facilitators in Their Native and Invaded Areas

It is shown how the invasive monk parakeet can host other species as tenants, increasing nest-site availability for native but also exotic species, and highlighting the complexity of biotic interactions in biological invasions.

Birds adopting weaver nests for breeding in Africa

Overall, there appeared to be a large diversity of nest adopter species for the traditional savanna living weavers (Ploceus, Bubalornis, Anaplectes, Plocepasser and Philetairus).

Protective nesting associations in birds

It is tentatively concluded that the majority of nesting associations are commensal in nature, and that only a few are parasitic or mutualistic, while it is argued that nesting associations provide many novel research opportunities.

the effects of adverse breeding conditions

It is found that reproductive success in sociable weavers was primarily influenced by nest predation and rainfall, and colony size was negatively associated with hatching and fledging success and number of young fledged per season.



Stabilizing selection on body mass in the sociable weaver Philetairus socius

Evidence is presented for strong stabilizing selection on body mass in a wild population of sociable weavers, verifying the prediction that body mass probably results from a trade–off between the risks of starvation at low mass and predation at high mass.

Woodpigeons nesting in association with hobby falcons: advantages and choice rules

Clues that would allow woodpigeons to choose the best protector may be early nesting by the hobby and its aggressiveness, which varies both between and within individuals during different nesting phases.

The Sociable Weaver, parts 1–5

  • Ostrich 44: 176–261
  • 1973

The Pygmy Falcon Polihierax Semitorquatus

Sociable Weavers — nature’s engineers

  • African Wildlife 35: 15–17
  • 1987

Pygmy Falcon population in the central Namib Desert, Namibia

  • Gabar 4: 10–13
  • 1989

The Birds of Africa, Vol

  • 1. Academic Press, London
  • 1982

Pygmy Falcon catches Sociable Weaver in flight

  • Gabar 5: 27
  • 1990

Birds of Prey of Southern Africa

  • David Philip, Cape Town Received January 2004, accepted May 2004 Editor: MD Anderson
  • 1982