Study provides insights into birds' migration routes

July 21, 2014
A songbird. Credit: Darren Irwin

By tracking hybrids between songbird species, investigators have found that migration routes are under genetic control and could be preventing interbreeding. The research, which is published in Ecology Letters, was conducted using geolocators that, like GPS, record the position of a bird and allow its long distance movement to be tracked.

Compared with their parents, hybrids exhibited increased variability in their : some used intermediate routes across less suitable areas, while others used the same routes as one parental group on fall migration and the other on spring migration.

"This is the first time we've been able to track songbirds over the entire annual cycle, and the data we collected support a longstanding hypothesis in ecological speciation, that differences in migratory behavior could be acting as postmating reproductive isolating barriers," said lead author Kira Delmore.

Explore further: Puffins 'scout out' best migration route

More information: Delmore, K.E. and Irwin, D.E. Hybrid songbirds employ intermediate routes in a migratory divide. Ecology Letters (2014). DOI: 10.1111/ele.12326.

Related Stories

Puffins 'scout out' best migration route

July 21, 2011

(PhysOrg.com) -- Individual Atlantic puffins 'scout out' their own migration routes rather than relying on genetic ‘programming’ or learning routes from a parent, a new study suggests.

Environmental conditions may impact bird migration

May 14, 2014

Wind conditions during spring migration may be a predictor of apparent annual survival and the timing of breeding in yellow warblers, according to results published May 14, 2014, in the open access journal PLOS ONE by Anna ...

Recommended for you

Whiskers help animals sense the direction of the wind

August 24, 2016

Many animals appear to have an impressive ability to follow the wind to find food, avoid predators, and connect with potential mates. Until now, however, no study had examined how land mammals know the direction of the wind. ...

Scientists develop new techniques to track how cells develop

August 24, 2016

Understanding how various cell types differentiate themselves during development is one of the fundamental questions in developmental biology. Using genome-editing tools, Harvard scientists are getting closer to finding answers.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.