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Article
J. M. M. Ekstrom, Auteur ; T. Burke, Auteur ; L. Randrianaina, Auteur ; T. R. Birkhead, AuteurWe describe the unusual mating system of the Greater Vasa Parrot Caracopsis vasa. The dull black plumage of males and females is similar but females are significantly larger than males. Females are promiscuous and copulated with at least five di[...]
Article
T. R. Birkhead, Auteur ; K. Schulze-hagen, Auteur ; G. Palfner, AuteurHans Duncker (1881-1961) is among the first avian geneticists, but remains poorly known. He trained as a biologist, completing his PhD at the University of Gottingen in 1905 and then became a high-school teacher in Bremen where he remained for t[...]
Article
E. Schut, Auteur ; N. Hemmings, Auteur ; T. R. Birkhead, Auteur
Article
M. Winterbottom, Auteur ; T. R. Birkhead, Auteur
Article
Robert Montgomerie, Auteur ; T. R. Birkhead, AuteurWe describe a unique, hand-coloured copy of Ray's (1678) The Ornithology of Francis Willughby that was apparently presented to Samuel Pepys between 1684 and 1686 during his presidency of the Royal Society. Somehow, this volume was not catalogued[...]
Article
T. R. Birkhead, Auteur ; J. Hall, Auteur ; E. Schut, Auteur ; N. Hemmings, AuteurUnhatched eggs are a common phenomenon in birds and are often referred to as being 'infertile', which (confusingly) can mean at least two things: (1) that the ovum has not been fertilized or (2) that the embryo has died during development. These[...]
