Home » UPSC IAS » Consider the following : 1. Bats 2. Bears 3. Rodents The phe

Consider the following : 1. Bats 2. Bears 3. Rodents The phe

June 1, 2025 by rawan239

Consider the following :

1. Bats
2. Bears
3. Rodents

The phenomenon of hibernation can be observed in which of the above kinds of animals?

1 and 2 only

2 only

1, 2 and 3

Hibernation cannot be observed in any of the above

This question was previously asked in

UPSC IAS – 2014

Download PDF Attempt Online

Hibernation is a state of inactivity and metabolic depression in endotherms. It is observed in various animal groups, including mammals like bats, bears, and many rodents.

Bats enter deep hibernation. Many rodents, such as groundhogs, ground squirrels, and hamsters, are well-known hibernators. While the hibernation of bears is sometimes debated in terms of its physiological depth compared to smaller mammals, they do enter a state of reduced metabolic activity, body temperature, and heart rate for extended periods during winter.

True hibernation involves a significant drop in body temperature (close to ambient), drastic slowing of metabolic rate, and infrequent arousals. Some animals, like bears, enter a less profound state sometimes called ‘winter sleep’ or torpor, where the body temperature drop is less severe and arousals might be more frequent, but it still serves the purpose of conserving energy during periods of food scarcity and cold.

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