. Bulletin of the British Ornithologists' Club. o 30 â Extinct species â¡ Other threatened species. Threat/cause of extinction Figure 7. Causes of recent avian extinctions compared to threats to extant threatened birds. Extinct species include Extinct («=131), Extinct in the Wild (n=4), and Critically Endangered (Possibly Extinct) species (n=\5). Other threatened species include those classified as Critically Endangered (excluding Possibly Extinct), Endangered and Vulnerable («=1,193). causes of extinctions (implicated for and of species respectively) than as a threat to extant t
. Bulletin of the British Ornithologists' Club. o 30 â Extinct species â¡ Other threatened species. Threat/cause of extinction Figure 7. Causes of recent avian extinctions compared to threats to extant threatened birds. Extinct species include Extinct («=131), Extinct in the Wild (n=4), and Critically Endangered (Possibly Extinct) species (n=\5). Other threatened species include those classified as Critically Endangered (excluding Possibly Extinct), Endangered and Vulnerable («=1,193). causes of extinctions (implicated for and of species respectively) than as a threat to extant threatened species ( and of species respectively). However, as Blackburn et al. (2004) pointed out, invasive species (particularly predators) are still a potentially important driver for future extinctions. Most islands currently have few invasive predators: colonisation by additional predators is likely to lead to progressively more extinctions unless prompt intervention is achieved. 25 n 20 15 £ 10 E â Habitat loss/degradation D Invasive species â¡ Exploitation lj IHnlilll lo ID CD co CO CD Year Figure X. Causes of avian extinctions over time. Totals include Extinct («=T31), Extinct in the Wild (n=4), and Critically Endangered (Possibly Extinct) species («=15).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Ornithologists' Club. London : British Ornithologists' Club
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