• Astropecten irregularis (Pennant, 1777) kamster
  sand sea star
  
• Ateles paniscus (Linnaeus, 1758) bosduivel
  red-faced spider monkey
  
• Athene noctua (Scopoli, 1763) steenuil
  little owl
  
• Aulacorhynchus prasinus Gould, 1835 smaragdarassari
  emerald toucanet
  
• Australaster giganteus Etheridge Jr., 1892 zeester
  starfish
  
• Australopithecus afarensis Johanson & White, 1978
• Australopithecus africanus Dart, 1925
• Autographa gamma (Linnaeus, 1758) gamma-uil
  silver Y
  
• Aythya ferina (Linnaeus, 1758) tafeleend
  common pochard
  
• Aythya fuligula (Linnaeus, 1758) kuifeend
  tufted duck
  
• Aythya marila (Linnaeus, 1761) topper
  greater scaup
  
• azuriet azuriet
  azurite
  
• Babyrousa babyrussa (Linnaeus, 1758) Buru babirusa
  babiroessa
  
• Balaenoptera borealis Lesson, 1828 noordse vinvis
  sei whale
  
• Balaenoptera musculus (Linnaeus, 1758) blauwe vinvis
  blue whale
  
• Balearica pavonina (Linnaeus, 1758) zwarte kroonkraanvogel
  black crowned crane
  
• Balistoides conspicillum (Bloch & Schneider, 1801) luipaardtrekkervis
  clown triggerfish
  
• bariet bariet
  barite
  
• Barnardius zonarius (Shaw, 1805) port-lincolnparkiet
  Australian ringneck
  
• barnsteen barnsteen
  
• Barringtonia sp.
• basalt basalt
  basalt
  
• Basilornis celebensis (Gray, 1861) sulawesikoningsspreeuw
  Sulawesi myna
  
• Basilosaurus sp. Harlan (1834) vroege walvisachtige
  fossil whale
  
• Bassariscus astutus (Lichtenstein, 1830) Noord-Amerikaanse katfret
  ring-tailed cat
  
• Bathynomus giganteus A. Milne-Edwards, 1879 reuzenpissebed
  giant isopod
  
• Bathypolypus sponsalis (P. Fischer & H. Fischer, 1892) octopus
  globose octopus
  
• bauxiet bauxiet
  bauxite
  
• Beaucarnea recurvata Lem. elephant's foot
  olifantspoot
  
• Belone belone (Linnaeus, 1760) geep
  garfish
  
• Beltanelliformis brunsae Menner 1974 Beltanelliformis
  Beltanelliformis
  
• Benthosuchus sushkini (Efremov 1929) amfibie
  amphibian
  
• Berberis vulgaris L. zuurbes
  common barberry
  
• Berberomeloe majalis (Linnaeus, 1758) oliekever
  oil beetle
  
• bergkristal bergkristal
  rock crystal
  
• Bertholletia excelsa Bonpl. paranoot
  Brasil nut
  
• Bertholletia sp.
• beryl beryl
  beryl
  
• Betta splendens Regan, 1910 Siamese kempvis
  Siamese fighting fish
  
• Betula nana L. dwergberk
  dwarf birch
  
• Bison bison (Linnaeus, 1758) bizon
  American bison
  
• Bison bonasus (Linnaeus, 1758) wisent
  European bison
  
• Bison priscus Bojanus, 1827 steppewisent
  steppe bison
  
• Bitis gabonica (Duméril, Bibron & Duméril, 1854) gabonadder
  Gaboon viper
  
• Bjerkandera fumosa (Pers.) P.Karst. rookzwam
  big smoky bracket
  
• Boa constrictor Linnaeus, 1758 boa constrictor
  boa constrictor
  
• Bolinus beyrichi (von Koenen, 1889)
• Bombus veteranus Fabricius, 1793 zandhommel
  
• Bombycilla garrulus (Linnaeus, 1758) pestvogel
  Bohemian waxwing
  
• Bombyx mori Linnaeus, 1758 zijdevlinder
  silkmoth