If you spend any time walking in coniferous forests, you've no doubt wandered right under these busy little birds without knowing it. They feed high in the treetops and are so small and active that they are easily missed - unless you’re a seasoned birder and can recognize the noisy high-pitched calls of foraging flocks.
As we all know, winters in the North can be harsh. For some animals that don't migrate or hibernate, the subnivean zone is their key to survival.
But what if you are predator? How do you survive this period of scarcity and extreme weather? To solve this problem, some of our predators have adapted hunting strategies that allow them to detect the presence and precise movements of the subnivean dwellers.
