Territory in Bird Life by Eliot Howard.
 
In "Territory in Bird Life," ornithologist Eliot Howard dives deep into the fascinating world of avian territoriality. He explores the concept of territory itself, from its establishment and defense to the seasonal shifts that influence bird distribution. Howard delves into the motivations behind this behavior, examining how securing a territory impacts everything from breeding success to food acquisition. By studying various bird species, Howard unveils the complex strategies birds employ to claim and maintain their own slice of the natural world. This classic text offers a captivating exploration of avian behavior, providing valuable insights for both bird enthusiasts and scientists alike.
 
With an introduction by Julian Huxley and James Fisher and Illustrations by G E Lodge and H Gronvold