My partner, John Mirau, had a home next to
Lake San Marcos in the unincorporated community of Lake San Marcos, in the North County region of San Diego County. On July 30, 2022 Judy and I took a small boat out on the lake and followed its shoreline, with John, his wife Susan, and some other friends. One of the fun water fowl on the lake is the black swan, an import from Australia.
Wikipedia notes that breeding pairs of black swans have been reported in Orange County in Lake Forest, Irvine, Newport Beach and Santa Ana. Well, I can verify that there are also breeding pairs in Lake San Marcos as we have seen them sitting on eggs and have seen cygnets with them as well. As the range map below indicates, they are found in Australia. However, Wikipedia notes introduced populations in New Zealand, the UK, Japan, Mainland China and the U.S. in Florida, North Carolina and California.
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| Illustration from Birds of the World. |
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| Range from Birds of the World. |