In summer, Yellowstone transforms into a wildlife paradise, with a cruel dark side. It explodes with life, pitting every animal against all others to find food, raise offspring and stay alive. From torrential floods in spring to burning sun in August, summer presents new challenges and opportunities. Animal dramas ensue: predators on the prowl and parents protecting offspring, bears fighting wolves, and trout running gauntlets of river otters and osprey. Even the hummingbird goes to battle, fighting in mid-air to protect a territory of wildflowers.