The British Bird Book - Frederick B Kirkman

Excerpt from The British Bird Book: 200 Plates in Colour and Numerous Photographs; A Complete Work on the Birds Nests and Eggs of Great Britain
Like other birds, guillemots and razorbills express the rebirth of love in the spring by a variety of actions. These are usually called courtship actions, but, as noted in another chapter,1 the term is, strictly speaking, inexact, for such actions occur in the case of birds that live in pairs throughout the year, and continue after mating has taken place. They are simply the outward and visible Sign of the birds' feelings, and may be witnessed at all times during the breeding season. The display of the cock sparrow can, for instance, be seen any day from January to J uly - that is, during nearly half the year.
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