Huddling
Definition
Huddling is a thermoregulation strategy used primarily by emperor penguins during the Antarctic winter, in which thousands of individuals pack tightly together in a slow-moving mass. Birds on the windward edge gradually rotate to the sheltered centre, ensuring no individual is exposed to the full force of the cold for too long. Temperatures inside a huddle can reach over 37 °C even when the external temperature is −50 °C. This cooperative behaviour is essential for male emperors to survive the 65-day fasting period while incubating eggs.
Related Terms
A brood pouch is a fold of feathered skin on a penguin's lower abdomen that covers and insulates the egg during incubation.
Counter-current heat exchange is a vascular adaptation in which arteries carrying warm blood from the body core run directly alongside veins returning cold blood from the extremities.
A penguin colony (also called a rookery) is a breeding aggregation that can range from a few dozen pairs to over a million individuals.
Related Species
Species where huddling is especially relevant.
Frequently Asked Questions
What does huddling mean in penguin biology?
Huddling is a thermoregulation strategy used primarily by emperor penguins during the Antarctic winter, in which thousands of individuals pack tightly together in a slow-moving mass. Birds on the windward edge gradually rotate to the sheltered centre, ensuring no individual is exposed to the full force of the cold for too long. Temperatures inside a huddle can reach over 37 °C even when the external temperature is −50 °C. This cooperative behaviour is essential for male emperors to survive the 65-day fasting period while incubating eggs.