The Tree Sparrow is the smaller and rarer of the two UK species of Sparrows. It is estimated to have declined by over 90% between 970 and 2008, although recent data suggests that the decline has ended and there maybe hints of a recovery in population.
I am semi-retired after a career in medical sciences. I now work from home doing independent research and consultancy amongst other things. One advantage of this is that I do have time to indulge my interests including birdwatching, natural history, steam trains and history particularly ancient history.
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