Global Positioning Stem (GPS) collars have been great tools for monitoring the movement of animal populations in vulnerable situations, such as polar bears that are at risk of extinction. GPS collars help you closely monitor your polar bear movements, help broaden your understanding of their polar habits, and help you know how these bears are affecting the impacts of climate change.
The squirrels are attuned in their brains to understand that owls are a threat because it is a predator. This is visual stimuli that evolved over many years to elicit a conditioned response. This is an innate behavior (meaning that it has been pre-programmed into an animal's genes) and offspring are naturally born with it.