Clasificación de la Biblioteca del CongresoQL751.U413

animal behavior(1,659) animal rights(114) animal stories(215) animal welfare(86) animals(14,601) anthropology(208) ants(68) autism(335) babies(302) baby(125) badgers(42) bears(262) bees(70) behavior(413) behavioral ecology(25) big book(118) biology(2,546) birds(800) bugs(110) butterflies(93) Canada(219) cats(540) children(783) children's(1,105) children's literature(211) cognition(84) communication(187) dog(88) dogs(662) dolphins(147) early reader(131) easy reader(148) ecology(567) elementary(119) environment(246) evolution(671) evolutionary psychology(44) family(438) fish(135) forest(110) fox(75) horses(147) human-animal relationships(61) humor(308) informational(465) informative(72) insects(478) instinct(32) intelligence(89) juvenile(307) juvenile non-fiction(138) kangaroo(62) kids(235) life science(252) Life Sciences(61) lions(100) mammals(620) migration(351) mothers(195) natural science(196) nature(4,331) nature writing(97) ocean(137) outdoors(105) owls(126) penguins(77) pets(295) photographs(172) photography(241) picture book(1,840) polar bears(64) popular science(108) preschool(120) prey(44) primary(93) primates(68) psychology(688) rabbits(126) rats(110) reference(405) reproduction(46) reptiles(114) science(7,022) science nonfiction(103) snakes(85) snow(216) sociobiology(122) sounds(76) survival(126) toddler(82) whales(186) wild animals(208) wilderness(71) wildlife(632) winter(1,183) wolf(58) wolves(357) youth(120) zebras(43) zoo(148) zoo animals(60)