Osterley Park
From Londonbirders
A fantastic National Trust house with extensive parkland in Osterley in the London Borough of Hounslow. 5 minutes walk from Osterley Station or 15 mins from Isleworth. The H28 bus goes almost to the gate, and the H91, H37, 267, 237 and 117 will all take you near.
The parkland is very varied with mature mixed and oak woodland, landscaped parkland, managed grassland, farmland and several ornamental lakes which support a decent variety of ducks and geese. The park is supposed to see 80-90 species during the course of the year. It is particularly well-known locally for its ring-necked parakeets and mandarin ducks; less common species include lesser-spotted woodpecker, treecreeper and (apparently) little owl.