A recent study published by researchers from the University of Wisconsin-Eau Claire and the University of California, Davis has revealed that California ground squirrels are opportunistic omnivores, meaning they eat a variety of food sources including nuts, seeds, grains, as well as small animals like voles. The discovery was made after observing 74 interactions between June and July, where about 42% involved active hunting of voles.
Contrary to previous assumptions that California ground squirrels primarily consume granivorous foods, the study found that these rodents are capable of adapting their diet in response to environmental changes. This newfound flexibility challenges our understanding of ground squirrels and highlights the importance of continued research into their natural behavior.
Lead researcher Jennifer E. Smith noted, “We had never seen this behavior before, as squirrels are one of the most familiar animals to people.” The study’s findings suggest that California ground squirrels employ similar strategies to adapt to changing environments, similar to raccoons, coyotes, and even humans. Postdoctoral research fellow Sonja Wild stated, “I could barely believe my eyes when I first saw the behavior on video.”
The “carnivorous behavior” was observed in all age groups and genders of California ground squirrels at a local park between June 10 and July 30. The tendency to hunt voles emerged alongside an increase in vole numbers reported by citizen scientists.
Researchers believe that this adaptability could help California ground squirrels persist in environments rapidly changing due to human presence. Further research is needed to answer questions about the frequency, ecological impact, and whether this trait is passed down.
Source: https://eu.usatoday.com/story/news/nation/2024/12/18/california-ground-squirrel-carnivore-video/77074585007