Common Swifts enter a form of hibernation when the weather turns bad, new research has revealed.
Mark Walker and Prof. Ian Rotherham of Sheffield Hallam University discovered that on cold wet summer days, flying insects become scarce. On such days, nestling Common Swifts were often also extremely cold. Nestlings of most bird species die quickly if their body temperature drops by even a small amount. However, swifts were able to survive even when their body temperature dropped by almost half.
Lees meer: Birdwatch Magazine
Mark Walker and Prof. Ian Rotherham of Sheffield Hallam University discovered that on cold wet summer days, flying insects become scarce. On such days, nestling Common Swifts were often also extremely cold. Nestlings of most bird species die quickly if their body temperature drops by even a small amount. However, swifts were able to survive even when their body temperature dropped by almost half.
Lees meer: Birdwatch Magazine
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