Navigation Links
Looks matter to female barn swallows

Even after they have paired with a male, the female North American barn swallow still comparison-shops for sexual partners. And forget personality; the females judge males by their looks -- the reddish color of the males' breast and belly feathers.

If the male's red breast is not as dark as other males in the population, the female is more likely to leave him and then secretly copulate with another male, according to a Cornell University study featured on the cover of the journal Science (Sept. 30, 2005).

"The bad news for male swallows is the mating game is never over," said lead author Rebecca Safran, who conducted the study while a Cornell postdoctoral researcher in ecology and evolutionary biology, and in the Cornell Laboratory of Ornithology. "It is dynamic and continual. This is something that most humans can relate to -- think of how much time and money we spend on our looks and status long after we have established stable relationships."

Barn swallow (Hirundo rustica erythrogaster ) males have a wash of reddish-chestnut color from their throats to their bellies, and this color varies among birds from very pale red-brown to a dark rusty-red. Like many songbirds, half of all male barn swallows typically care for at least one young chick that was actually fathered by another bird. The researchers used this widespread phenomenon of cheating to test the factors that may keep a female barn swallow faithful to her mate. Sometimes males even rear an entire nest of illegitimate young.

After all pairs had laid their first set of eggs, Safran removed the eggs so that the females would mate again. Before the females chose their mates for their second nest, Safran captured the males and randomly assigned them to one of three treatments. She either painted their throats, breast and belly feathers with a red marker to enhance their feathers to match the darkest -- and most attractive -- males in the population, or left them alone or pa
'"/>

Source:Cornell University News Service


Page: 1 2 3

Related biology news :

1. To sea or not to sea: When it comes to salmon sex, size sometimes doesnt matter
2. Size matters: Preventing large mammal extinction
3. Space matters: Estimating species diversity in the fossil record
4. Bigger brain size matters for intellectual ability
5. UCSB researchers discover shape matters to macrophages
6. Researchers find that bumblebees flower choice matters
7. For Pacific white shrimp, gender matters when competing for food
8. Particle size matters to bacteria ability to immobilize heavy metals
9. Monitoring poisons in the environment -- a woolly matter
10. Lithium builds gray matter in bipolar brains, UCLA study shows
11. The penalty of having a sister -- why sibling sex matters for male saiga antelopes
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Looks matter female barn swallows

(Date:9/17/2014)... State,s Institute for the Arts and Humanities has received ... for a two-year project, "The Boundaries of the Human ... project will support a wide-ranging series of events aimed ... humanities. One involves artists and researchers who are exploring ... the idea of humanism, and the other involves the ...
(Date:9/17/2014)... (Sept. 17, 2014) A rare genetic disorder known as ... a recent joint investigation by researchers at San Diego ... In addition to suggesting better treatment options for people ... into the genetic underpinnings of autism., Jacobsen syndrome affects ... Institutes of Health. It occurs in a person when ...
(Date:9/17/2014)... the Copenhagen Centre for Social Evolution and Yale University ... birth weight and -length can partially predict the likelihood ... autism and schizophrenia later in life. The study analyzed ... hospital diagnoses for up to 30 years, and adjusted ... is published today in the Proceedings of the ...
Breaking Biology News(10 mins):Mellon Foundation awards grant for major project in the humanities and sciences 2A link between Jacobsen syndrome and autism 2Size at birth affects risk of adolescent mental health disorders 2Size at birth affects risk of adolescent mental health disorders 3
... scientists has produced a new type of rice that ... rice crops. Professor Andy Pereira at the Virginia Bioinformatics ... Indonesia, Israel, Italy, Mexico and The Netherlands to identify, ... HARDY that improves key features of this important grain ...
... WI, Sept. 18, 2007 -- Recently, researchers at Iowa ... of a popular crop model. By zeroing in on ... they can help improve yield predictions across a variety ... findings in the September-October issue of Crop Science. ...
... Metagenomics is a revolutionary approach to study microbes. Rather ... is applied directly to environmental samples to obtain information ... a specific habitat studied. The ocean is an ideal ... whose biomass equals that of all other living organisms ...
Cached Biology News:HARDY rice: less water, more food 2HARDY rice: less water, more food 3Simulating kernel production influences maize model accuracy 2Metagenomics of the deep Mediterranean 2
(Date:9/17/2014)... , 17 de septiembre de 2014 /PRNewswire/ ... principal proveedor mundial de soluciones logísticas avanzadas ... de la vida, anunció hoy la contratación ... global con sede en Rótterdam, Países Bajos, ... clientes Europa en rápido crecimiento. Según los ...
(Date:9/17/2014)... 2014 First antibacterial ... a truly novel class of anti-infective in ... a biopharmaceutical company developing a truly novel ... has secured £4.0m ($6.4m) to advance the ... a range of Gram-positive infections including  Clostridium ...
(Date:9/17/2014)... The Alliance for Clinical ... non-profit collaborative building a global system to enhance ... announced Phase 3 of its Site Accreditation and ... H. Kalali, Vice-President, Global Head, Neuroscience Center of ... and Quality Integration (CQI) Consulting will lead the ...
(Date:9/16/2014)... energy from jaw movements has been created by a ... that the device can generate electricity from eating, chewing ... or wearable electronic devices, such as hearing aids, cochlear ... first results of the device,s performance have been published ... Materials and Structures . , Jaw movements have proved ...
Breaking Biology Technology:Cryoport contrata a Broekman Group para mejorar su apoyo operativo y logístico en Europa 2Cryoport contrata a Broekman Group para mejorar su apoyo operativo y logístico en Europa 3Cryoport contrata a Broekman Group para mejorar su apoyo operativo y logístico en Europa 4Cryoport contrata a Broekman Group para mejorar su apoyo operativo y logístico en Europa 5MGB Biopharma Secures £4.0m ($6.4m) to Advance its Novel Lead Antibacterial, MGB-BP-3, into Clinical Development 2MGB Biopharma Secures £4.0m ($6.4m) to Advance its Novel Lead Antibacterial, MGB-BP-3, into Clinical Development 3MGB Biopharma Secures £4.0m ($6.4m) to Advance its Novel Lead Antibacterial, MGB-BP-3, into Clinical Development 4MGB Biopharma Secures £4.0m ($6.4m) to Advance its Novel Lead Antibacterial, MGB-BP-3, into Clinical Development 5MGB Biopharma Secures £4.0m ($6.4m) to Advance its Novel Lead Antibacterial, MGB-BP-3, into Clinical Development 6MGB Biopharma Secures £4.0m ($6.4m) to Advance its Novel Lead Antibacterial, MGB-BP-3, into Clinical Development 7Global Standards Initiative for Clinical Research Sites Advances 2Global Standards Initiative for Clinical Research Sites Advances 3Global Standards Initiative for Clinical Research Sites Advances 4'Smart material' chin strap harvests energy from chewing 2
... United,Therapeutics Corporation (Nasdaq: UTHR ) announced today ... results before the open of market,on Thursday, May ... half-hour teleconference on Thursday,May 1, 2008, at 9:00 ... 1-800-603-1777, with international callers dialing 1-706-679-8129.,A rebroadcast of ...
... 2008 / b3c newswire / - Sloning BioTechnology ... on a project to synthesize a gene mutant library ... and controlled ratio at preselected positions within a given ... Slonomics™, a unique DNA engineering platform using defined sets ...
... Duke University chemists have found a way to grow ... very large numbers, removing a major roadblock in ... carbon nanotubes also follow parallel paths as they grow ... electronic performance, said Duke associate chemistry professor Jie Liu, ...
Cached Biology Technology:Sloning and the Kornberg group at Stanford University starting evaluation project regarding the synthesis of a Statistically Randomized Gene Library 2Nanotubes grown straight in large numbers 2Nanotubes grown straight in large numbers 3
Rabbit polyclonal to GABA A Receptor gamma 2 ( Abpromise for all tested applications). entrezGeneID: 2566 SwissProtID: P18507...
Rabbit polyclonal to VPAC2 ( Abpromise for all tested applications). entrezGeneID: 7434 SwissProtID: P41587...
Anti-GOSR2 Monoclonal AntibodyOther Sub-Family: not assigned-Other Applications: Immunocytochemistry, Immunoprecipitation, Western Blot...
Mouse monoclonal [4A2.2] to SLC6A4 ( Abpromise for all tested applications). entrezGeneID: 6532 SwissProtID: P31645...
Biology Products: