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Huddling in the heat? Rarely seen thermoregulatory behaviours of the Southern Pied Babbler Turdoides bicolor

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posted on 2023-06-13, 07:04 authored by Amanda BourneAmanda Bourne, Camilla SoraviaCamilla Soravia

  

Huddling is an important thermoregulatory behaviour used by many small group-living endotherms to conserve energy during cold weather or periods of food scarcity. It is not typically considered a strategy for keeping cool during hot weather, largely because endotherms produce body heat which can aggravate heat discomfort. However, we recorded 423 instances of huddling behaviour at high temperatures in an arid-zone endemic bird, the Southern Pied Babbler Turdoides bicolor, in the southern Kalahari desert. Huddling was most often observed on the ground, at the base of trees, and is likely to represent competition over access to limited cool microsites during extremely hot weather rather than a specific thermoregulatory behaviour in itself. 

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University of Cape Town

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Fitzpatrick Institute for African Ornithology

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