I have some 20 acres and since my son has chosen another career than smallholding, its over to the wildlife. I have a large pond which is left strictly alone and usually entertains wild mallard a couple of Canadas and Grey Lags.
I have 3 bat boxes I made - all in use and a kestrel which uses the fields and/or is resident. There is a resident buzzard in the (v) old oak at the bottom of the field and I have released and will continue to, 25 greys a year. The fields are grazed by a few sheep and wildflowers are resident. In another field, they have been planted. We have cornflowers, ladysmock, buttercups, knapweed, poppies and some others; nettles, brambles etc for insects and butterflies.
I trap (larsen) magpies every year. I try not to shoot on the property as we have a pair of resident barn owls whose 'house' I made from scrap wood. I have half a dozen bird boxes and a couple of owl boxes as tawny owls are local and numerous, lovely to hear most evenings.
The buzzards now follow the tractor whilst I am topping with no real fear and the kestrel gets the odd mouse (of which there are many). There are bullfinches in spring and our mistle thrushes have returned for an early start to nesting. We encourage swallows and martins which are rare and getting rarer locally. Many around us do the same, in fact I get my English partridge from a neighbour who has been releasing 50-100, for years now.
I shoot pheasants, clays and deer and hope to meet a boar but killing animals and preserving them and their habitat are alternative sides of the same coin.
I am planning another pond for wildlife and my neighbour has just excavated a pond for his son to use for wild duck - he shoots the odd few for the family. I am sure its used by other wildlife as well. All in all more money involved than many antis ever consider investing in wildlife.
Nothing like seeing a buzzard soaring over wild fields filled with flowers. Letting the hedges grow to accomodate the widest range of nesting birds and naturally we have rabbits and take the odd one for the pot and to stop attacks on the fruit trees. The local pheasants produced eight young last year, which are still here and are fed corn every morning on the patio. Their Dad seems to have snuffed it (Michigan blue back) but there are two young males Ring necks) ready to take over in the spring.
We have insect hotels and loads of other stuff including a sparrowhawk which likes to roost in the open garage and chase birds round the garden - needs to be discouraged early on. Most of the wild birds and pheasants use the chicken feeders so winter can be an expensive time !
Its not difficult and because I shoot and have done for years, putting plenty back is important for me and, I know, many others.
actually its great that they have no idea we do all of this and especially where otherwise they would show up uninvited 
