Critically Endangered birds: a global audit
A State of the world’s birds report
Critically Endangered species are threatened by human activities
The key threat to Siberian Crane is the loss and degradation of wetland staging and wintering sites through agricultural, industrial and other development, particularly in China. Further declines are predicted with the development of the Three Gorges Dam. (JAAP SCHELVIS/WWW.RAREBIRDSYEARBOOK.COM)
Critically Endangered species are impacted by a range of threats, but humans cause nearly all of these, in particular through agriculture, deliberate or accidental spreading of invasive alien species, logging, hunting and trapping.
Critically Endangered species face a broad range of threats Critically Endangered species are impacted by a range of threats. The most important are agriculture and aquaculture (affecting 65% of species), the negative impacts of invasive alien species (52%), logging (43%), and hunting/trapping (41%). These factors threaten species principally through causing habitat degradation (93%) and/or direct mortality (64%).
The threats facing Critically Endangered species 140 Unknown impact Low impact High/medium impact
120 100 Noumber of species
Cherry-throated Tanager has been heavily impacted by forest clearance within its small known range in EspĂrito Santo state, Brasil: only fragments of habitat now remain. (ANDRE DE LUCA/WWW.RAREBIRDSYEARBOOK.COM)
80 60 40 20 0 Agriculture
Invasive species
Logging
Hunting Residential & Climate & trapping commercial change & develoment weather
Pollution
Energy Change in Human Water Transportation Fisheries intrusions & production fire regime management & service disturbance & mining corridors
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