Species that are considered high risk have a well-documented history of invasiveness in at least one location globally, and a high or medium climate match to the contiguous United States.
Alopochen aegyptiaca is a species of goose native to sub-Sarahan Africa and the Nile Valley. It has become established across much of northern Europe and in scattered locations in North America and the Middle East, most often by escape from captivity. In the U.S., breeding populations are located in Florida, Arkansas, Texas, and California. A. aegyptica has been known to cause extensive crop damage and is susceptible to infection by avian influenza viruses that cause outbreaks in domestic avian populations. Multiple studies in South Africa demonstrate reduced reproductive success for other avian species due to competition for nest space and aggressive behavior on the part of A. aegyptica. Although not as well documented, in Europe A. aegyptica is reported to outcompete ospreys (Pandion haliaetus) and barn owls (Tyto alba) for nest sites, and to drown a number of native species. Climate match for A. aegyptica in the Continental U.S. is high, with highest match in the southern U.S. and California. Overall risk posed by A. aegyptica is high.
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High Risk
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