Abstract The Common Swift Apus apus breeds across much of Europe and Asia with two subspecies recognised. The Asian-breeding subspecies A. a. pekinensis has been suspected to occur as a vagrant to Europe but, to date, there are no accepted records. Although pekinensis is similar to the European-breeding nominate race, a number of features can be reliably use

...

Stay at the forefront of British birding by taking out a subscription to British Birds.

Subscribe Now