Cool birds: Facultative use by an introduced species of mechanical air conditioning systems during extremely hot outdoor conditions

Raegan Mills, Kevin J. McGraw

Research output: Contribution to journalArticlepeer-review

Abstract

Rapid climate change across the globe is having dramatic effects on wildlife. Responses of organisms to shifting thermal conditions often include physiological and behavioural accommodations, but to date these have been largely viewed and studied as naturally evolved phenomena (e.g. heat avoidance, sweating, panting) and not necessarily as strategies where animals exploit other anthropogenic conditions or resources. Moreover, the degree to which native versus introduced species show thermal plasticity has generated much conservation and ecological interest. We previously have observed introduced rosy-faced lovebirds (Agapornis roseicollis) perching in the relief-air vents on building faces in the Phoenix, Arizona, USA, metropolitan area, but doing so only during summer. Here, we show that such vent-perching events are significantly associated with extreme outdoor summer temperatures (when daily local highs routinely exceed 40°C). In fact, the temperature threshold at which we detected lovebirds starting to perch in cool air vents mirrors the upper range of the thermoneutral zone for this species. These results implicate novel, facultative use of an anthropogenic resource - industrial air-conditioning systems - by a recently introduced species (within the last 35 years) to cool down and survive extremely hot conditions in this urban 'heat-island' environment.

Original languageEnglish (US)
Article number20200813
JournalBiology letters
Volume17
Issue number3
DOIs
StatePublished - Mar 24 2021

Keywords

  • Agapornis roseicollis
  • heat tolerance
  • rosy-faced lovebird
  • thermal ecology
  • urban heat island

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Agricultural and Biological Sciences(all)

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