Why are some species endangered

Hazard categories

The ten hazard categories

As a result of the risk analysis, ten categories have been distinguished in the German Red Lists since 2009:

0          Extinct or lost
Species that have disappeared in the reference area or of which wild populations are no longer known. The populations are either verifiably extinct, as a rule exterminated (the previous habitats or locations have changed so much that they can no longer be found again) or disappeared, i.e. there is reasonable suspicion due to unsuccessful searches over a longer period of time that their populations are extinct.

1 Critically Endangered
Species that are so critically endangered that they will become extinct in the foreseeable future if the causes of threat persist. Survival in the reference area can only be ensured through immediate elimination of the causes or effective protective and auxiliary measures for the remaining populations of these species.

2 Endangered
Species that have declined significantly or are threatened by ongoing or foreseeable human impacts. If the current endangerment of the species is not averted, it is likely to move into the “critically endangered” category.

3 Endangered
Species that have declined noticeably or are threatened by ongoing or foreseeable human impacts. If the current endangerment of the species is not averted, it is likely to move into the “critically endangered” category.

G Endangerment of unknown extent
Species that are endangered. Individual examinations reveal a hazard, but the information available is not sufficient for an exact assignment to categories 1 to 3.

R Extremely rare
Extremely rare or very locally occurring species, their populations in sum have not decreased in the long or short term and which are not currently threatened, but are particularly susceptible to unforeseeable dangers.

V Warning list
Species that have declined noticeably but are not currently endangered. If inventory-reducing effects persist, a classification in the "endangered" category is likely in the near future.

D Insufficient data
The information on distribution, biology and endangerment of a species is insufficient if the species has so far often been overlooked or not differentiated or has only recently been taxonomically investigated or taxonomically not sufficiently clarified or due to a lack of specialists it cannot be assessed with regard to a possible endangerment.

* Not at risk
Species are currently not considered endangered if their populations have increased, are stable or have decreased so little that they do not need to be classified in at least Category V.

♦ Not rated
No hazard analysis is carried out for these species.

Image in the header of the page:

Pasque flower infructescence (Pulsatilla vulgaris), photographed on the Swabian Alb. The species is considered endangered.