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Birds and Mammals
A Coggle Diagram about Placental Mammals (Primates, Hoofed Mammals, Rodents, Manatees and Dugongs, Cetaceans, Insectivores, Flying Mammals, Carnivores, Rabbits, Hares, and Pikas, Trunk-Nosed Mammals, Anteaters, Armadillos, and Sloths, Most animals are placental mammals. This is a mammal whose embryo develops inside the mother's body. The embryo grows in an organ called the uterus. An organ called the placenta attaches the embryo to the uterus., Living placental mammals are divided into 18 orders., The time in which an embryo develops within the mother is called a gestation period. This period lasts a different amount of time for each kind of placental mammal. In humans, this period lasts about 9 months. and Mammals are divided into groups based on how they develop. These groups are placental mammals, manotremes, and marsupials.), Characteristics of Birds, Kinds of Birds (Birds of prey, Water Birds, Flightless Birds, Perching Birds, There are abouth 10,000 species of birds on Earth., Birds vary in color, shape, and size., Scientists group living bird species into 25 different orders., Birds are often grouped into four nonscientific categories: flightless birds, water birds, perching birds, and birds of prey. and These categories don't include all birds. But they do show how different birds can be.), Monotremes and Marsupial and Characteristics of Mammals