Ridgway’s Hawk (Buteo ridgwayi) is listed as Critically Endangered because it has a small and fragmented population, which was previously in steep decline. Successful conservation action has now reversed such declines and the species is observed to be increasing throughout both its largest extant population in Los Haitises National Park and additional reintroduced populations. If…
Class: Aves
Galapagos Penguin
Long-term monitoring of the Galapagos Penguin (Spheniscus mendiculus) indicates that the population is fluctuating, primarily as a result of marine perturbations that may be becoming more extreme through climate change. These perturbations have caused an overall very rapid population reduction over the last three generations (31 years). In addition, the species has a small population…
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
El Oro Parakeet
El Oro Parakeet (Pyrrhura orcesi) has a very small population. Remaining habitat is fragmented, and both range and population are thought to be declining. As a result, the species qualifies as Endangered. Available at: https://www.iucnredlist.org/species/22685851/181549899
Worthen’s Sparrow
Worthen’s Sparrow (Spizella wortheni) has a very small and declining population, and fledging success is very low. It is therefore listed as Endangered. Available at: https://www.iucnredlist.org/species/22721182/118141491
Wattled Curassow
Wattled Curassow (Crax globulosa) was once widespread across the Amazon basin. High hunting pressure has been causing drastic declines, so that the population is now very small and restricted to scattered, isolated subpopulations. These declines are ongoing and it is therefore listed as Endangered. Available at: https://www.iucnredlist.org/species/22678537/221386350
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…
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…