We have a similarly semi-managed couple of acres where the bees are - old grazing pasture where we have planted fruit & native trees and not done much else. Last year the local council did a survey so they could call it a site with "wildlife value", as a bit of protection against planning. They found 95 species of flora and, on the land or nearby...
Muntjac, Fox, Badger four species of bats, Field Voles. Hedgehogs, Barn Owls, Red Kite, Sparrowhawk, Buzzard, Kestrel, Tawny Owl, Green and Great Spotted Woodpeckers, Song Thrush, Dunnock, Blackcap, Chiffchaff, Long-tailed Tit, Chaffinch, Greenfinch, Goldfinch, Bullfinch, Mistle Thrush, Starling, House Sparrow, Song Thrush, Linnets, Grass Snakes, Common Toads, Smooth Newts, Marbled White butterfly, Holly Blue butterfly, Rhinoceros Beetle, dragonflies and bumblebees
Nothing astonishing, but still makes it seem worthwhile. This was just a single day in April. We have seen many other butterflies and insects other than that