• Larosterna inca (Lesson, 1827) incastern
  Inca tern
  
• Larus argentatus Pontoppidan, 1763 zilvermeeuw
  European herring gull
  
• Larus canus Linnaeus, 1758 stormmeeuw
  common gull
  
• Larus fuscus Linnaeus, 1758 kleine mantelmeeuw
  lesser black-backed gull
  
• Larus marinus Linnaeus, 1758 grote mantelmeeuw
  great black-backed gull
  
• Latimeria chalumnae Smith, 1939 West Indian Ocean coelacanth
  gewone coelacant
  
• Latrodectus hesperus Chamberlin & Ivie, 1935 westelijke zwarte weduwe
  western black widow
  
• Latrodectus mactans (Fabricius, 1775) oostelijke zwarte weduwe
  southern black widow
  
• Latrodectus sp.
• Leanchoilia superlata Walcott 1912 primitieve geleedpotige
  primitive arthropod
  
• Leiopathes grimaldii Roule, 1902
• Leiothrix lutea (Scopoli, 1786) Japanse nachtegaal
  red-billed leiothrix
  
• Lemniscomys barbarus (Linnaeus, 1767) zebragrasmuis
  Barbary striped grass mouse
  
• Lemur catta Linnaeus, 1758 ringstaartmaki
  ring-tailed lemur
  
• Leonaspis sp. Richter & Richter, 1917 trilobiet
  trilobite
  
• Leontopithecus rosalia (Linnaeus, 1766) gouden leeuwaapje
  golden lion tamarin
  
• Leopardus tigrinus (Schreber, 1775) tijgerkat
  oncilla
  
• Lepas anatifera Linnaeus, 1758 gewone eendenmossel
  duck barnacle
  
• Lepidium sativum L. tuinkers
  garden cress
  
• Leptocorisa oratoria (Fabricius, 1794) rice ear bug
  rijstwants
  
• Leptolepis knorri Agassiz, 1843 haringachtige beenvis
  herringlike fish
  
• Leptonycteris nivalis (Saussure, 1860) greater long-nosed bat
  bladneusvleermuis
  
• Leptosynanceia asteroblepa (Richardson, 1844) steenvis
  mangrove stonefish
  
• Lepus europaeus Pallas, 1778 haas
  European hare
  
• Lethocerus indicus (Lepeletier & Serville, 1825) giant water bug
  reuzenwaterwants
  
• Leucadendron platyspermum R. Br.
• Leucaena leucocephala (Lam.) de Wit witte mimosa
  white leadtree
  
• Leucanthemum vulgare Lam. margriet
  ox-eye daisy
  
• Leucobryum glaucum Ångström in Fries, 1845 kussentjesmos
  pin cushion moss
  
• Libelloides coccajus (Denis & Schiffermüller, 1775) libelgaasvlieg
  lacewing
  
• Lilium martagon L. Turkse lelie
  Martagon lily
  
• Limax maximus Linnaeus, 1758 grote aardslak
  giant garden slug
  
• Limosa lapponica (Linnaeus, 1758 rosse grutto
  bar-tailed godwit
  
• Limosa limosa (Linnaeus 1758) grutto
  black-tailed godwit
  
• Limulus polyphemus (Linnaeus, 1758) Atlantic horseshoe crab
  Atlantische degenkrab
  
• Linckia guildingi Gray, 1840 zeester
  common comet star
  
• Linckia laevigata (Linnaeus, 1758) zeester
  azure seastar
  
• Lissotriton vulgaris (Linnaeus, 1758) kleine watersalamander
  smooth newt
  
• Lithobates catesbeianus (Shaw, 1802) Amerikaanse stierkikker
  American bullfrog
  
• Lithocarpus sp. steenvruchteik
  stone oak
  
• Lithodes maja (Linnaeus, 1758) augustinuskrab
  Norway king crab
  
• Lobatus gigas (Linnaeus, 1758) koninginneschelp
  queen conch
  
• Locustella lanceolata (Temminck, 1840) kleine sprinkhaanzanger
  lanceolated warbler
  
• Lodoicea maldivica (J.F.Gmel.) Pers. coco de mer
  coco de mer
  
• Loligo vulgaris Lamarck 1798 gewone pijlinktvis
  European squid
  
• Lomaptera linae Gestro, 1893 gouden tor
  rose chafer
  
• Lonchura punctulata (Linnaeus, 1758) muskaatvink
  scaly-breasted munia
  
• Lonicera periclymenum L. wilde kamperfoelie
  honeysuckle
  
• Lophius piscatorius Linnaeus, 1758 zeeduivel
  angler
  
• Lophophorus impejanus (Latham, 1790) himalayaglansfazant
  Himalayan monal