Saint Lucian Whiptail (Cnemidophorus vanzoi) is listed as Critically Endangered on the basis that this species effectively represents a single, severely fragmented population, and is at continual risk from the possible introduction of invasive mammals to any or all of the four small islands where the species presently survives, which would lead to a projected…
Category: Extinction Edition
Chilean Woodstar
Chilean Woodstar (Eulidia yarrellii) is classified as Critically Endangered based on evidence that it has undergone an extremely rapid population decline. Urgent research and targeted conservation actions are now required to understand, halt and reverse this decline. Available at: https://www.iucnredlist.org/species/22688244/181468935
Mangrove Finch
Mangrove Finch (Geospiza heliobates) has an extremely small, severely fragmented range, and only two viable subpopulations. Recent surveys suggest that the number of locations and mature individuals are both declining significantly, and consequently it qualifies as Critically Endangered. Available at: https://www.iucnredlist.org/species/22723786/182523098
Mojave Desert Tortoise
Mojave Desert Tortoise (Gopherus agassizii) was assessed as Critically Endangered A2bce+A4bce based on population reduction (decreasing density), habitat loss of over 80% over three generations (90 years), including past reductions and predicted future declines, as well as the effects of disease (upper respiratory tract disease / mycoplasmosis). Available at: https://www.iucnredlist.org/species/97246272/3150871
Hooded Warbler
Hooded Warbler (Setophaga citrina) has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to…
Scarlet Macaw
Scarlet Macaw (Ara macao) has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (extent of occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the…
Savannah Sparrow
Savannah Sparrow (Passerculus sandwichensis) has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). Despite the fact that the…
Guanaco
Guanaco (Lama guanicoe) is considered to be of Least Concern based upon its wide continental distribution (around one million km2), its presumed total population size (around one million adults), and the presence of numerous protected areas across its range of distribution (56 protected areas covering around 146,000 km2). However, Guanaco actual conservation measures continue to…
Ovenbird
Ovenbird (Seiurus aurocapilla) has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable,…
Eastern Box Turtle
Eastern Box Turtle (Terrapene carolina) is considered Vulnerable because it is documented as rare with a total population estimated to be less than 10,000, it has a fairly small area of occurrence, and no subpopulation is estimated to contain more than 1,000 individuals; there is an ongoing decline in the number of individuals, due to…