Flight delays: Study finds out why some African birds stay home longer

Date:  March 21, 2018

Source:  University of British Columbia

Summary:

Parents of millennials still living at home aren't the only ones with children that refuse to leave. Many animal species have adult offspring that are slow to take flight, but when and how they leave has been poorly understood by scientists. Now, new UBC research on a desert-dwelling African bird is yielding some answers.

Martha Nelson-Flower, a postdoctoral fellow at UBC, studied the behaviour of wild southern pied babblers, which live in family groups of up to 14 in the Kalahari Desert in South Africa. Her findings, published in the Journal of Animal Ecology, suggest that better prospects elsewhere, as well as family dynamics between brothers and stepfathers, play a big part in determining when offspring disperse.

Continued  

African birds show signs of biasness between biological and step off-springs

3 hours ago

24-08-2016

Washington D.C., Aug. 24 : A recent biological research has found an African desert-dwelling male bird that favours his biological sons and alienates his step-sons.

Martha Nelson, the researcher, said: "Nepotism has likely played a vital role in the evolution of family life in this species."

The species is the southern pied babbler, a black and white bird found in Botswana, Namibia, South Africa and Zimbabwe.

These birds live in groups and chicks are raised by both parents as well as other adult birds. The groups can range in size from three to up to 14 birds.

The group's dominant male bird appears to decide which of the subordinate males to tolerate in the group.

Nelson's research shows subordinate male birds spend less time in a group if they are unrelated to the dominant male bird.

These subordinate male birds are essentially pushed out of the group by their stepdads or in some cases their brothers-in-law. They are then forced to join other groups as subordinates or to live alone.

Over the course of five years in the summer, Nelson observed 45 different groups of southern pied babblers in the Kalahari Desert, walking around with the birds at dawn and dusk.

She also relied on data collected by her co-author Amanda Ridley. Together, the researchers analyzed data from 11 years of observation.

Read more