Mr. Hill reprints an interesting technique for sketching birdsong with dashes and curves, the results akin to an avian morse code. Hill attributes the idea to wildlife artist R. Bruce Horsfall, but, sadly, little can be found online regarding his contributions to song sketching.
How Birds Live is an endearing and succinct introduction to bird biology and behaviour, and should engage any young naturalist. Hill illustrates some of the ways birds benefit people, e.g by eating mosquitoes and crop-damaging insects and rodents – one pair of barn owls ate more than 2,000 mice in a summer. He also explains how birds evolve to suit their métier: by having webbed feet or hunting talons, and downy feathers for warmth and stealth or strong, sleek feathers for flight.