Torpor: White-backed swallows snooze through the rain

Area of Science:

• Avian physiology
• Metabolic regulation
• Animal behavior

Background:

• Energy-saving torpor is generally considered infrequent and mild in songbirds.
• Limited data exists on the depth and duration of torpor in wild passerine species.

Purpose of the Study:

• To investigate the occurrence and characteristics of torpor in free-ranging white-backed swallows.
• To challenge the prevailing view of torpor limitations in songbirds.

Main Methods:

• Field observations of white-backed swallows.
• Monitoring of physiological parameters during torpor bouts (specifics not detailed in abstract).

Main Results:

• White-backed swallows demonstrate significantly deeper and longer torpor than previously anticipated for songbirds.
• The study provides evidence against the notion that songbirds are incapable of substantial torpor.

Conclusions:

• Torpor in songbirds, exemplified by the white-backed swallow, may be more prevalent and profound than commonly accepted.
• This research necessitates a re-evaluation of torpor strategies across diverse avian groups.