In the bird world, male and female blue tits are hard to distinguish for the human observer. However, in the UV-range, visible to birds, the male is much more colourful. A closer look at the monogamous mating system of these ...
Evolution
Apr 3, 2013
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(PhysOrg.com) -- The size of the black breast bib - the badge - and bill colour of male House Sparrows change over the course of the year. Such ornaments usually signal quality and dominance of a male to his conspecifics ...
Plants & Animals
Jun 4, 2010
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Different methods of collecting bird sperm produce different sperm lengths, potentially affecting the conclusions of fertility studies.
Plants & Animals
Aug 17, 2017
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2
There are roughly 50 billion individual birds in the world, a new big data study by UNSW Sydney suggests—about six birds for every human on the planet.
Ecology
May 17, 2021
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107
The European House Sparrow has a story to tell about survival in the modern world. In parts of its native range in Europe, House Sparrow numbers are down by nearly 60%. Their fate in the U.S. and Canada is less well known. ...
Plants & Animals
Feb 11, 2021
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Biologists have long known that inbreeding can be detrimental. Inbreeding results in less genetic variation, making species more vulnerable if changes occur that require them to adapt.
Evolution
Jul 30, 2020
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24
Less-pretty female house sparrows tend to lower their aim when selecting a mate. Addressing the lack of studies on condition-dependency of female mate choice, researchers writing in the open access journal BMC Evolutionary ...
Evolution
Aug 26, 2010
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House sparrows can be found on nearly every continent including North America, South America, Africa and Australia, where they are not native but an invasive species. New research into these highly social songbirds reveals ...
Plants & Animals
Sep 2, 2020
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121
London's house sparrows (Passer domesticus) have plummeted by 71% since 1995, with new research suggesting avian malaria could be to blame.
Ecology
Jul 17, 2019
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356
(Phys.org)—A new University of South Florida study of house sparrows, which have become one of the world's most common invasive species, is providing scientists with physiological and behavior markers that could help keep ...
Plants & Animals
Sep 11, 2012
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