Scientists have discovered unprecedented evidence of squirrels exhibiting carnivorous behaviors, including hunting, killing, and eating voles in a new study. The research, published in the Journal of Ethology, found that California ground squirrels, native to Northern California’s grasslands, are not just herbivores or granivores but also opportunistic omnivores.
In parts of Northern California, vole infestations have been observed, leading to an increase in the local squirrel population. The study revealed that 42% of encounters between squirrels and voles involved squirrels actively hunting and consuming the voles. This change in behavior is significant, as it suggests that squirrels can adapt their diet in response to environmental changes.
The researchers used live traps to capture, mark, and release California ground squirrels on a biweekly basis, collecting detailed data on each squirrel’s sex, reproductive status, and body mass. The team observed the animals’ behavior on non-trapping days, recording 74 interactions between the squirrels and voles.
The study highlights the importance of understanding animal resilience to environmental changes. As climate change and drought continue to impact ecosystems, it is essential to study how species adapt to these changes. The findings also suggest that dietary plasticity, or the ability to capitalize on available resources, may be a key factor in an animal’s survival.
According to lead study author Jennifer Smith, “This research radically changes our perception of squirrels, one of the most familiar mammals in the world.” The discovery underscores the incredible resilience of some species and highlights the importance of studying these processes for conservation.
Source: https://edition.cnn.com/2024/12/18/science/california-squirrels-carnivorous-eating-voles/index.html