Glenn
20 years ago in my garden there were lots of greenfinches. Chaffinches were common and there was always a hedgehog around rummaging in the garden at night, I have not seen a single greenfinch or chaffinch in years and no hedgehogs either. Mayflies are much reduced in numbers. I also used to see many stag horn beetles but none in the last few years. Apart from global warming of course there is all the pollution and insecticides and herbicides used. Garden centre shelves are stocked full of glyphosate and a neighboring farm regularly sprays next to the allotment.