“Even for birds, practice makes perfect”
Instinct or Experience: the art of nesting goes beyond innate bird’s features
According to a new study done by researchers from Edinburgh, Glasgow and St Andrews Universities the southern masked weaver birds appear to vary their techniques from one nest to the next.
Dr Patrick Walsh of Edinburgh University said that as birds gained more experience, they dropped blades of grass less often. "If birds built their nests according to a genetic template, you would expect all birds to build their nests the same way each time. However this was not the case," added Dr Walsh. "Southern Masked Weaver birds displayed strong variations in their approach, revealing a clear role for experience.
Source: BBC News