California Bats in Winter: Hibernation and High Desert Silence
Winter is the quietest season for bats in California, but it is not a complete absence. Many species spend the cold months in deep hibernation, tucked away in crevices and caves. I find a certain peace in knowing they are resting, waiting for the warmth of spring to return. Visit our [California bat](/wildlife/california/bat) trunk page or find [where to see bats in California](/wildlife/california/bat/where-to-see).
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 1, 2026.
- 3
- species recorded
- July, August, September
- peak months
Real sighting data, source iNaturalist
7,270 verified observations on iNaturalist of bat have been recorded in California, most often in July, August, September.
Winter is the quietest season for bats in California, but it is not a complete absence. Many species spend the cold months in deep hibernation, tucked away in crevices and caves. I find a certain peace in knowing they are resting, waiting for the warmth of spring to return. Visit ourCalifornia battrunk page or findwhere to see bats in California.
Where do bats hide during California winters?
They seek out frost-free caves and deep rock crevices where the temperature stays stable. These microclimates are essential for their survival, protecting them from the freezing temperatures outside.
Do any bats stay active in the winter?
Occasional flights occur on warm winter nights when a few insects might be out. However, these are rare and most bats stay in a deep sleep to conserve as much energy as possible until spring.
How do they survive without food?
They rely entirely on stored body fat to sustain their vital functions. Their heart rate and metabolism drop significantly, allowing them to stretch their limited energy reserves for several months.
Can you see bats in the desert during winter?
Low desert areas might see some activity on warmer nights, but it is still minimal. Once winter passes, you can look forward to theirspring emergenceor review theirfall migration.
Gear and field guides
Frequently asked questions
Where do bats hide during California winters?+
They seek out frost-free caves and deep rock crevices where the temperature stays stable. These microclimates are essential for their survival, protecting them from the freezing temperatures outside.
Do any bats stay active in the winter?+
Occasional flights occur on warm winter nights when a few insects might be out. However, these are rare and most bats stay in a deep sleep to conserve as much energy as possible until spring.
How do they survive without food?+
They rely entirely on stored body fat to sustain their vital functions. Their heart rate and metabolism drop significantly, allowing them to stretch their limited energy reserves for several months.
Can you see bats in the desert during winter?+
Low desert areas might see some activity on warmer nights, but it is still minimal. Once winter passes, you can look forward to theirspring emergenceor review theirfall migration.
Keep exploring
More places to see bat
More wildlife in California
Common questions about bats