The Hudson Memorial Bird Sanctuary is a carved stone memorial commemorating the 19th century writer and naturalist, William Hudson. He helped to establish the Royal Society for the Protection of Birds and campaigned for wild areas in parks, at a time when they were always neat and tidy.
The carving, by Sir Jacob Epstein, represents Rima, the child goddess of nature who featured in Hudson's novel Green Mansions, published in 1904. The engravings are by the designer Eric Gill. The memorial was installed in 1924 and was immediately controversial. The Daily Mail wrote: "take this horror out of our park".
Today, this area is a refuge for smaller birds, such as robin, tits, blackbird, wren and goldcrest.