My first visit (approx 3 hours):

Kestrel
Goldfinch
Nuthatch
Coot
Canada Goose
Little Grebe
Woodpigeon
Carrion Crow
Pied Wagtail
Swallow
Swift
Buzzard

Although the gardens seem to concentrate on ornamental horticulture, (which attract plenty of pollinators and butterflies),
there is plenty of space put aside for wildflower meadows, open water and woodland with dead timber and cleared rhodedendron. There seems to be a strategy of improving the biodiversity of the site in general.

I saw plenty of dragonflies over the lakes and ponds...who knows perhaps a hobby from the neighbouring mosses will be teased, I can imagine a barn owl would like the habitat too.