The wolf set

A wolf has a pack. Mom and Dad and pups!

A wolf pack is a family. A mom and dad wolf lead it.

A wolf pack is a family. It is a mom, a dad, and their pups. The mom and dad pick when and where to hunt.

A wolf pack is a family. The mother and father lead the group. Their pups follow. Older brothers and sisters help too. Most packs have four to ten wolves.

A wolf pack is a family. The parents lead. The older siblings help. The pups grow up surrounded by relatives who feed them, protect them, and teach them what they need to know. This chapter follows a wolf family through mating, denning, pup-rearing, and the day a young wolf leaves home.

A gray wolf pack is a family. The group typically consists of a breeding pair (a mother and father) and their offspring from the current and previous years. The parents lead the pack the way human parents run a household: by raising pups, coordinating movements, and choosing where to hunt. Pack sizes usually range from four to ten members, though packs can be larger where prey is plentiful.¹

A wolf has pups in a den.

Baby wolves are born with their eyes shut.

A wolf mom has pups in a den. Their eyes are shut, so they cannot see.

In spring, wolf pups are born in a den. Each newborn weighs about one pound. Its eyes and ears are sealed shut.

Wolf pups are born inside a den with their eyes and ear canals sealed shut. They are blind, deaf, and weigh about one pound each. A typical litter has four to six pups, though litters of one to ten have been recorded.

Newborn wolf pups are born completely blind and deaf, with their eyes and ear canals sealed shut. They weigh roughly one pound at birth. A mother typically delivers four to six pups, though litters of one to three or as many as ten have been recorded. All the pups in a litter are born in the den within a few hours of each other.¹⁰

A wolf pack gets pups fed.

The whole wolf pack helps raise the pups.

All of the wolf pack helps bring up the pups. It is not just the mom and dad!

The whole wolf family raises pups. Older siblings babysit while adults hunt and bring food. This teamwork helps pups survive.

The whole wolf pack helps raise the pups. While the mother nurses the newborns, older siblings, aunts, uncles, and the father all hunt, bring back food, babysit, and play with the growing pups. This cooperative care improves pup survival.

The whole pack helps raise the pups that will eventually make that journey. While the mother nurses the newborns in the den, older siblings, aunts, uncles, and the father all contribute by hunting, bringing back food, babysitting, and playing with the growing pups. After a hunt, adult wolves swallow meat and carry it back to the den in their stomachs. When the pups lick and nuzzle the adults' mouths, the adults regurgitate the partially digested food for the pups to eat. This cooperative care, shared among all pack members and not just the parents, improves pup survival and makes the family's future possible.⁷²

A wolf can howl to its pack.

Wolves howl to find each other. Awooo!

A wolf can howl to find its pack. Then the pack howls back!

Wolves howl to find each other. A howl can travel up to ten miles across open land. Each wolf has its own voice, so packmates can tell who is calling.

Wolves howl to find each other. A wolf's howl features a low pitch and a long duration that can carry up to 10 miles across open terrain. When pack members are separated while hunting or traveling, they howl to locate one another and regroup. Each wolf has a unique voice, so packmates can tell who is calling.

A wolf's howl features a low pitch and long duration that can carry up to ten miles across open terrain. When pack members are separated while traveling or hunting across their large territory, they howl to locate one another and regroup. Each wolf has a unique voice, so packmates can tell who is calling.²⁵

The pack is not here. A wolf can smell it!

A wolf can smell another animal more than a mile away. Sniff, sniff!

A wolf's nose is packed with smell cells. It can smell an animal more than a mile off.

A wolf's nose holds about 200 million smell sensors. A human nose has only about 5 million. Wolves can smell another animal more than a mile away.

A wolf's nose holds about 200 to 280 million scent receptors. A human nose has only about 5 million. Wolves dedicate a large share of their brain to processing scent, giving them one of the strongest noses in the animal world.

A wolf's snout contains roughly two hundred to two hundred and eighty million olfactory receptors, compared to only about five million in a human nose. The olfactory center in a wolf's brain is also proportionally much larger than a human's, so a significant share of the wolf's neural processing is dedicated to interpreting scent. Depending on the wind, a wolf can detect other animals (potential prey, rival predators, or packmates) from more than one to two miles away.⁴²

A wolf pack can run and run.

A wolf pack roams a huge, wild home.

A wolf pack's home land can be huge! The pack checks it from end to end.

A wolf pack's territory can be bigger than a whole city. In the Great Lakes, territories cover 25 to 150 square miles. On the Arctic tundra, they can be more than 1,000 square miles.

A wolf pack's territory can be huge. In the Great Lakes and the Rockies, territories range from 25 to 150 square miles. On the Arctic tundra, where prey is spread thin, territories can exceed 1,000 square miles. The pack patrols and defends these boundaries through howling, scent marking, and direct confrontation.

Wolf territories range from about twenty-five to a hundred and fifty square miles in areas with dense prey like the Great Lakes or the Northern Rockies, but can exceed a thousand square miles on the Arctic tundra where prey is spread out. Packs patrol and defend their territory through howling, scent-marking, and direct confrontation with rival packs. The enormous size of some wolf territories means the species needs wild space on a very large scale.⁵¹