For example, specimen QM F30696, a left distal tibiotarsus piece from the Oligo-Miocene boundary at Riversleigh, is similar to but than and differs in details from "G." disneyi.
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Apart from the 1-3 extinctions in more recent times, another 1-4 species have gone extinct as a consequence of early human settlement: Hodgen's Waterhen (Gallinula hodgenorum) of New Zealand—which belongs in subgenus Tribonyx—and a species close to the Samoan Moorhen from Buka, Solomon Islands, which is almost certainly distinct from the Makira Moorhen as the latter cannot fly.
Common Moorhen | Moorhen | Dusky Moorhen | HMS ''Moorhen'' | HMS Moorhen |
Of the two lakes built in the garden, the larger lake, located in the centre of the park, is the habitat for water birds such as Mallard, Moorhen, Ring-necked Parakeet, White Wagtail, Wren, Blackbird, Blackcap, House Sparrow, Serin, and Greenfinch.
HMS Cockatrice was originally a composite paddle vessel called HMS Niger, launched in 1880, renamed Cockatrice in 1881 and renamed again to HMS Moorhen in 1896.