The flat pigtoe, a freshwater mussel that was found in the southeast of the US, has only been observed on a few occasions in the wild before disappearing. A freshwater mussel scientist with the US Fish and Wildlife Service, Anthony Andy Ford stated that when he sees those endangered species, it often crosses his mind that he would be the last person to witness them, the AP reported. READ | Scientists identify fossils of ancient dog at Georgia village may have evolved in E. He added that this is a sad warning as these extinctions are a result of human-made causes which led to environmental issues. The BBC, citing the New York Times, reported that Bridget Fahey, who maintains the species categorisation in the Fish and Wildlife Service said each of the 23 species signifies a complete loss to the country's natural heritage and worldwide biological diversity. The FWS said that the decision was made after thorough assessments of the best available science for all of these 23 species. The FWS has suggested that these species be removed from the Endangered Species Act (ESA), which safeguards threatened species, the BBC reported. The other species declared extinct include 10 birds, one bat, two fish, one plant and wight types of mussel. The ivory-billed woodpecker, not sighted officially since 1944, was one of the USA's largest woodpecker species. The United States Fish and Wildlife Service (FWS) has declared the ivory-billed woodpecker and 22 other species as extinct.
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