Owls of the world /
König, Claus,1933-
Weick, Friedhelm.
König, Claus,1933-Owls.
London : Christopher Helm,
2008.
Previous ed.: published as Owls. Robertsbridge: Pica, 1999.
Includes bibliographical references (p. 490-518) and index.
Owls.
Owls
Birdsongs.