1001 Space Earth Nature Evolution Fossils and Prehistoric Life Dinosaurs Simple Animals Insects and Spiders Fish Amphibians Reptiles Birds Sea Mammals Land Mammals Plant Kingdom How Plants Live Unusual Plants Ecology Conservation Animal Behaviour Pets and Farm Animals History Human World Science and Technology

Choose a Page:Are the world's deserts getting la...Why are rhinos endangered?When did the dodo become extinct?What is conservation?Which whale species is most threat...What is global warming?What is oil pollution?Why is DDT harmful?Why are rain forests under threat?What is overfishing?*Why is the passenger pigeon extinct?*How is African wildlife protected?Why are some species endangered? Why is the passenger pigeon extinct? In the early 1800s, billions of passenger pigeons could be found in North America. Over the next century, the birds were killed in their millions by people. The last one died in a zoo in 1914.   Previous: Back Book: 1001 Section: Nature Chapter: Conservation