INTRODUCTION MEET THE GRAY WOLF Gray wolves roam through a snowy forest in search of prey Their howls echo through the trees Gray wolves are mammals a kind of animal Other kinds of animals you may know are insects fish amphibians reptiles and birds Gray wolves stay alert in case prey is nearby
All mammals share certain features They are vertebrates animals with backbones that have fur or hair All mammals are warm blooded and all mammal mothers make milk to feed their babies Most mammals give birth to live young although a few lay eggs Gray wolves share these traits with other mammals They also have traits that set them apart
