| English | German |
| coralline red algae | Kalkrotalge |
| infra-red Fourier transform spectroscopy | Fouriertransformation-Infrarot-Spektroskopie |
| infra-red heat surveys | Infrarot-Wärmeabstrahlungskontrollen |
| Madagascar red owl | Madagaskar-Schleiereule (Tyto soumagnei) |
| non-dispersive infra-red absorption analyzer | nichtdispersiver Infrarot-Absorptionsanalysator |
| OECD red tier | rote Stufe |
| OECD red tier | OECD-Verfahren der "roten Stufe" |
| phenol red solution | Phenolrot-Lösung |
| red algae | Rotalgen |
| red and blue lory | Diademlori (Eos histrio) |
| red-backed squirrel monkey | gelbes Totenkopfäffchen (Saimiri oerstedii) |
| red bellied spider monkey | Panama-Klammeraffe (Ateles geoffroyi panamensis) |
| red-browed parrot | Granada-Amazone (Amazona rhodocorytha) |
| red-capped parrot | Scharlachkopfpapagei (Pionopsitta pileata) |
| red colobus | Kirk's Colobus (Procolobus pennantii kirkii) |
| red colobus | Sansibarstummelaffe (Procolobus pennantii kirkii) |
| red-crowned amazon | Granada-Amazone (Amazona rhodocorytha) |
| red-crowned crane | Mandschurenkranich (Grus japonensis) |
| red-crowned parrot | Granada-Amazone (Amazona rhodocorytha) |
| red data list | rote Liste |
| red flag warning | höchste Alarmstufe |
| red-fronted amazon | Puerto-Rico-Amazone (Amazona vittata) |
| red-fronted kakariki | Laufsittich (Cyanoramphus novaezelandiae) |
| red-fronted kakariki | Ziegensittich (Cyanoramphus novaezelandiae) |
| red-fronted macaw | Rotohrara (Ara rubrogenys) |
| red-fronted parakeet | Laufsittich (Cyanoramphus novaezelandiae) |
| red-fronted parakeet, red-fronted kakariki, New Zealand parakeet | Laufsittich, Ziegensittich (Cynamoramphus novaezelandiae) |
| red-fronted serin | Rotstirngirlitz (Serinus pusillus) |
| red kite | Rotmilan (Milvus milvus) |
| red list | rote Liste |
| red list The series of publications produced by the International Union for the Conservation of Nature and Natural Resources (IUCN). They provide an inventory on the threat to rare plants and animal species. Information includes status, geographical distribution, population size, habitat and breeding rate. The books also contain the conservation measures, if any, that have been taken to protect the species. There are five categories of rarity status: endangered species; vulnerable organisms, which are those unlikely to adapt to major environmental effects; rare organisms, which are those at risk because there are few of them in the world, such as plants which only grow on mountain peaks or on islands; out of danger species, which were formerly in the above categories, but have had the threat removed because of conservation actions; and indeterminate species, which are the plants and animals probably at risk, although not enough is known about them to assess their status | Rote Liste |
| red list | Rote Liste |
| Red List of Threatened Animals | rote Liste über die bedrohten Tierarten |
| Red list of wastes | Rote Liste |
| red mud | Rotschlamm |
| red mud from the alumina production | Rotschlamm aus der Aluminiumherstellung |
| red-necked phalarope | Odinshühnchen (Phalaropus lobatus) |
| red-nosed saki | Weißnasensaki (Chiropotes albinasus) |
| red panda | Kleiner Panda (Ailurus fulgens) |
| red-rumped conure | Blaulatzsittich (Pyrrhura cruentata) |
| red seaweeds | Rotalgen (Rhodophyceae) |
| red siskin | Kapuzenselsig (Carduelis cucullata) |
| red sludge | Rotschlamm |
| red-spectacled amazon | Prachtamazone (Amazona petrei, Amazona pretrei) |
| red-spectacled parrot | Prachtamazone (Amazona petrei, Amazona pretrei) |
| red tide Sea water which is covered or discoloured by the sudden growth of algal bloom or by a great increase in single-celled organisms, dinoflagellates. Red tides are often fatal to many forms of marine life and, in some cases, can result in human deaths because the dinoflagellates are eaten by clams and mussels which concentrate the paralysing toxins which they produce | Rotschlamm / Rotschlick |
| red tide | Rotschlamm / Rotschlick |
| Tana river red colobus | roter Colobus |
| Tana river red colobus | Rotkopfstummelaffe |
| the photometric measurement of the red colouration | die Rotfaerbung wird photometrisch bestimmt |
