Try these kid-friendly search engines:
Kid Rex - www.kidrex.org
Fact Monster - www.factmonster.com
Try these animal sites:
National Geographic Animals A-Z - http://animals.nationalgeographic.com/animals/
National Zoo - http://nationalzoo.si.edu/
Animal Fact Guide - http://www.animalfactguide.com/
San Diego Zoo Kids - http://kids.sandiegozoo.org/animals
Kids Planet Endangered Species - https://defenders.org/wildlife
Sea World Animals - http://seaworld.org/en/ - go to ANIMAL INFO tab
All About Birds - http://www.allaboutbirds.org/
Audubon Society - http://www.audubon.org/field-guide - lots of bird information