It usually starts with a quiet morning walk, a child’s curious shriek, or a pet tugging insistently at a bush in the backyard. There it is—tiny, fragile, and utterly helpless-looking: a baby bird, ...

There are more than 600 bird species in the UK, with an estimated 83 million breeding pairs – down from 102 million half a century ago when reliable population studies began. They form an acoustic ...