Birds and Mammals
A Coggle Diagram about Birds (Kinds of feathers, Feathers help birds stay dry and warm, attract mates, and fly., They use their beaks to spread oil on their feathers in a process called preening. , When feathers wear out, birds replace them by molting. Molting is the process of shedding old feathers and growing new ones. , Most birds can fly. Even flightless birds, such as ostriches, have ancestors that could fly. , They are able to stay in the air because their wings cause lift. Lift is an upward force on a bird’s wings., Birds keep their eggs warm by brooding. Brooding is the act of sitting on eggs and using body heat to keep them warm., Many flying birds are also comfortable in the water. These water birds include cranes, ducks, geese, swans, pelicans, and loons. and When a perching bird lands in a tree, its feet automatically close around a branch.), A few mammals have unique backbones that have special con- nections between the vertebrae. This group includes anteaters, armadillos, and sloths., Mammals live in the coldest oceans, the hottest deserts, and almost every place in between. , All mammals have mammary glands. No other animal has these glands. Mammary glands are structures that make milk. However, only mature females produce milk in their mammary glands. , All animals need oxygen to get energy from their food. Like birds and reptiles, mammals use lungs to get oxygen from the air. But mammals have a muscle that helps them get air. The diaphragm (DIE uh FRAM) is a large muscle that helps bring air into the lungs. , One way they stay warm is by hav- ing hair. Mammals are the only animals that have hair. All mammals—even whales—have hair. , Mammals have teeth with different shapes and sizes for different jobs. Also, mam- mals replace their original baby teeth with a permanent set., A placental mammal is a mammal whose embryo develops inside the mother’s body. The embryo grows in an organ called the uterus., The time in which an embryo develops within the mother is called a gestation period , A few mammals have unique backbones that have special con- nections between the vertebrae. This group includes anteaters, armadillos, and sloths., Regina Treviño, Bats are the only mammals that fly. , Mammals that have large canine teeth and special molar teeth for slicing meat are called carnivores., Elephants are the only living mammals that have a trunk., Horses, pigs, deer, and rhinoceroses are some of the many mammals that have thick hoofs. A hoof is a thick, hard pad that covers a mammal’s toe. , Cetaceans (suh TAY shuhnz) are a group of mammals made up of whales, dolphins, and porpoises. All cetaceans live in the water., The smallest group of mammals that live in the water are manatees (MAN uh TEEZ) and dugongs (DOO gawngz)., The smallest group of mammals that live in the water are manatees (MAN uh TEEZ) and dugongs (DOO gawngz)., The only other living monotreme is the platypus. Only one species of platypus lives today. This animal lives in Australia. It looks very different from other mammals. , You probably know that kangaroos carry their young in a pouch. Kangaroos and other mammals with pouches are marsupials (mahr SOO pee uhlz). and Marsupials are born at an early stage of development. They are born just days or weeks after fertilization.