Myricaria germanica
Myxobolus cerebralis
Myzus persicae
Aphididae > Hemiptera > Insecta
N2
nitrogen —
Nannocystis exedens
Nannocystaceae > Myxococcales > Deltaproteobacteria
Navicula
Naviculaceae > Naviculales > Bacillariophyceae
Nemophila menziesii
Hydrophyllaceae > Boraginales > Magnoliopsida
Nemoria arizonaria
Geometridae > Lepidoptera > Insecta
Nemotaulius hostilis
Limnephilidae > Trichoptera > Insecta
Neochetina bruchi
Curculionidae > Coleoptera > Insecta
Neochetina eichhorniae
water hyacinth weevil — Curculionidae > Coleoptera > Insecta
Neochetina species
Neochetina spp.
water hyacinth weevil —
Neogale frenata
longtailed weasel — Mustelidae > Carnivora > Mammalia
Neospirifer
Neotoma
Woodrats — Cricetidae > Rodentia > Mammalia
Neotyphodium
Nicotiana glauca
Solanaceae > Solanales > Magnoliopsida
Nicrophorus investigator
burying beetle — Silphidae > Coleoptera > Insecta
Nitrososphaera sp.
Noccaea fendleri ssp. glauca
Brassicaceae > Brassicales > Magnoliopsida
Nomada
Apidae > Hymenoptera > Insecta
Nothofagus antarctica
Nysius groenlandicus
Lygaeidae > Hemiptera > Insecta
O. cataphylla
O. frigidae
O. implicatus
O. iridis
O2
oxygen —
Obtusicauda frigidae
Ochlerotatus pionips
Culicidae
Ochotona
pika — Ochotonidae > Lagomorpha > Mammalia
Oenothera macrocarpa
Onagraceae > Myrtales > Magnoliopsida
Oketaella
Omsia
Oncopeltus
milkweed bugs —
Opuntia engelmannii
Opuntia microdaysys
Order: cestoda
tapeworms —
Oreosiphon frigidae
O. frigidae —
Oscillatoria
Oscillatoriaceae > Oscillatoriales > Cyanophyceae
Osmia bicornis
red mason bee — Megachilidae > Hymenoptera > Insecta
Osmia coloradensis
Megachilidae > Hymenoptera > Insecta
Osmia cornifrons
Osmia cornuta
Megachilidae > Hymenoptera > Insecta
Osmia orientalis
Megachilidae > Hymenoptera > Insecta
Osmia pusilla
Megachilidae
Osmiini
solitary bees — Megachilidae > Hymenoptera > Insecta
Ovatus frigidae
Ovis aries
sheep — Bovidae > Artiodactyla > Mammalia