CITES , (Convention on International Trade in Endangered Species) publishes the Red List, which gives the official status of a species.
Species may be listed as
CRITICALLY ENDANGERED -
EXTINCT IN THE WILD -
Vulnerable, endangered and critically endangered are all described as THREATENED
A species that is described as rare is not necessarily threatened or endangered.
A species' natural state may be rare e.g.
· Predators and parasites can be expected to be less numerous than their prey
· Monophagous insects are usually less numerous than polyphagous
· Specialists are usually less numerous than generalists
· Species may be poorly collected or understood (boom or bust cycles, collectors not being in the right place at the right time, not using appropriate collection methods etc)
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Last modified on Sunday, 3 January 2016