During the summer months, when there is abundant food available and longer daylight hours, woodland caribou tend to be more active and less likely to sleep during the day. They may rest periodically in the shade or in areas with dense vegetation to escape the heat, but their sleep is typically shorter and more fragmented compared to the winter months.
In the winter, when food resources are scarce, and the days are shorter, woodland caribou spend a significant portion of their time sleeping to conserve energy. They typically seek out sheltered areas, such as dense forests or snow-covered hollows, to reduce heat loss and protect themselves from harsh weather conditions. During this time, they may have extended sleep sessions that can last for several hours.
Woodland caribou are known for their ability to bed down in deep snow, which provides insulation and protection from predators. They may dig shallow depressions or wallows in the snow, where they can rest comfortably and minimize their exposure to the cold.
Individual caribou within the same population may exhibit variations in their sleeping patterns. For example, some individuals may be more active during the day, while others may be more nocturnal. These differences can be influenced by factors such as age, sex, reproductive status, and personality traits.
Overall, woodland caribou have adapted their sleeping patterns to survive and thrive in their specific habitat and climate. By adjusting their activity levels and sleep schedules, they can optimize energy conservation and access food resources efficiently throughout the year.