As regular CFZ-watchers will know, for some time Corinna has been doing a column for Animals & Men and a regular segment on On The Track... particularly about out-of-place birds and rare vagrants. There seem to be more and more bird stories from all over the world hitting the news these days so, to make room for them all - and to give them all equal and worthy coverage - she has set up this new blog to cover all things feathery and Fortean.

Thursday 31 January 2013

Watch: Taxidermied Robot Sparrow Flips The Bird To Real Sparrows

Further research has been halted after the robot's head was ripped off by angry birds.

Male sparrows do indeed get angry, especially when another male is intruding on his territory. Angry birds can fight to the death in whirling masses of feathers and beaks. But sometimes a bird would rather try to bluff and scare off a potential foe, using rude wing gestures to show it’s ready to fight and welcomes the challenge (although it might not). To study this in more detail, scientists at Duke University stuffed some robotics equipment inside a dead bird.

Duke undergrad David Piech assembled a miniature processor and some servos and put it into a taxidermied sparrow. Then biologist Rindy Anderson and colleagues took it into a swamp sparrow breeding ground in Pennsylvania. The team rigged a speaker beneath a robo-bird perch, so the dummy sparrow would seem to be “singing” to alert other male birds of his presence. It also could move a wing, in a bird version of raising your fists. Then the team watched what happened.

The live birds responded aggressively toward the wing-waving robobird, Anderson said. They were so aggressive that they killed it--one bird ripped off robobird’s head during a true fight to the death. Further experiments are halted indefinitely.

The team also used a stuffed bird that could twist from side to side and not wave its wing, and the real birds attacked this one, too, but were not as aggressive about it. Anderson’s team thought the real birds might match the wing signals of the robobird, and they did, with each bird demonstrating different levels of aggression. The study is a step toward understanding how birds communicate using visual displays, as well as tweets and song, the researchers say. It’s published in the journal Behavioral Ecology and Sociobiology.

No comments:

Post a Comment