Tree Sparrow may not be the best species to focus on. In the Lee Valley we have seen a similar extinction but with absolutely no habitat change, and they have pretty much disappeared from everywhere in the SE. It's an easy one for Viridor to explain away.
Agree- we're monitoring literally everything we can. http://peteralfreybirdingnotebook.blogspot.co.uk/2017/01/post-truth-world.htmlThe net impact is a decline, with conservation management plan restoration habitats delayed and CMP target species overall in decline or have disappeared.
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