Conservation statuses

The Society's official vocabulary. Bylaw VI.

Abundant 8

No concern; possibly too little concern.

Irruptive 3

Population explodes unpredictably (slang booms).

Naturalized 2

Introduced species, now established.

Vulnerable 0

Declining range or breeding success.

Critically Endangered 1

Survives in fragmented habitat.

Extinct in the Wild 2

Survives only in captivity (legal, liturgical, or academic texts).

Extinct 1

Known only from preserved specimens.

Data Deficient 1

The honest status; use it more than feels comfortable.