Investor Presentaiton
The wildlife examined in this paper are
in the IUCN Red List categories of
Critically Endangered, Endangered,
Vulnerable, or Data Deficient.
A. Population size reduction. Population reduction (measured over the longer of 10 years or 3 generations) based on any of A1 to A4
A1
A2, A3 & A4
Critically Endangered
≥ 90%
≥ 80%
Endangered
≥ 70%
≥ 50%
Vulnerable
≥ 50%
≥ 30%
RED®
LIST
Adequate data
THE IUCN RED LIST
OF THREATENED SPECIES™
A1 Population reduction observed, estimated, inferred, or suspected in
the past where the causes of the reduction are clearly reversible AND
understood AND have ceased.
A2 Population reduction observed, estimated, inferred, or suspected in the
past where the causes of reduction may not have ceased OR may not be
understood OR may not be reversible.
A3 Population reduction projected, inferred or suspected to be met in the
future (up to a maximum of 100 years) [(a) cannot be used for A3].
A4 An observed, estimated, inferred, projected or suspected population
reduction where the time period must include both the past and the future
(up to a max. of 100 years in future), and where the causes of reduction may
not have ceased OR may not be understood OR may not be reversible.
based on
any of the
following:
(a) direct observation [except A3]
(b) an index of abundance
appropriate to the taxon
(c) a decline in area of occupancy
(AOO), extent of occurrence
(EOO) and/or habitat quality
(d) actual or potential levels of
exploitation
(e) effects of introduced taxa,
hybridization, pathogens,
pollutants, competitors or
parasites.
B. Geographic range in the form of either B1 (extent of occurrence) AND/OR B2 (area of occupancy)
Extinct (EX)
Extinct in the Wild (EW)
Regionally Extinct (RE)
Threatened categories
B1. Extent of occurrence (EOO)
B2. Area of occupancy (AOO)
Critically Endangered (CR)
Extinction
risk
AND at least 2 of the following 3 conditions:
Endangered (EN)
Vulnerable (VU)
(a) Severely fragmented OR Number of locations
Critically Endangered
< 100 km²
< 10 km²
Endangered
<5,000 km²
Vulnerable
< 20,000 km²
< 500 km²
< 2,000 km²
=1
≤5
≤ 10
Evaluated
Eligible for Regional
Assessment
Near Threatened (NT)
Least Concern (LC)
Data Deficient (DD)
All species
Not Applicable (NA)
Not Evaluated (NE)
(b) Continuing decline observed, estimated, inferred or projected in any of: (i) extent of occurrence; (ii) area of occupancy; (iii) area,
extent and/or quality of habitat; (iv) number of locations or subpopulations; (v) number of mature individuals
(c) Extreme fluctuations in any of: (i) extent of occurrence; (ii) area of occupancy; (iii) number of locations or subpopulations; (iv) number
of mature individuals
C. Small population size and decline
Number of mature individuals
AND at least one of C1 or C2
C1. An observed, estimated or projected continuing decline
of at least (up to a max. of 100 years in future):
C2. An observed, estimated, projected or inferred continuing
decline AND at least 1 of the following 3 conditions:
(a) (i) Number of mature individuals in each subpopulation
(ii) % of mature individuals in one subpopulation =
(b) Extreme fluctuations in the number of mature individuals
D. Very small or restricted population
Critically Endangered
Endangered
<2,500
< 250
25% in 3 years or
1 generation
(whichever is longer)
≤ 50
90-100%
20% in 5 years or
2 generations
(whichever is longer)
Vulnerable
< 10,000
10% in 10 years or
3 generations
(whichever is longer)
≤ 250
95-100%
≤ 1,000
100%
D. Number of mature individuals
D2. Only applies to the VU category
Restricted area of occupancy or number of locations with
a plausible future threat that could drive the taxon to CR
or EX in a very short time.
Critically Endangered
Endangered
Vulnerable
< 50
< 250
D1.
< 1,000
D2.
typically:
AOO < 20 km² or
number of locations < 5View entire presentation