August 10, 2016 by Bob Yirka
A team of researchers with the
Centre for Biological Diversity, School of Biology, University of St Andrews,
in the U.K. has found that the seemingly clever wire bending abilities of New
Caledonian crow Betty back in 2002 may not have been as impressive as
scientists at the time thought. They note in their paper published in Royal
Society Open Science that while conducting field experiments with other
crows of the same species in their native environment, several crows exhibited
the same behavior as Betty, suggesting that her behavior might have been more
responsive than insightful.
The video of Betty (made by a
team at the University of Oxford) using a wire in attempting to retrieve a
bucket of meat from inside a bottle captivated the science community when it
was first revealed—after poking at the bucket for a minute or so, she pulled
the wire out of the bottle, bent the tip to resemble a fish hook, dropped it
back into the bottle and then hooked the handle of the bucket, allowing her to
pull the meat up and out so she could eat it. The impression was that the crow had come up with a completely
novel solution to a problem she had never encountered before—all on the spur of
the moment. Such an ability was seen as an example of comparative cognition and
high intelligence. But now it appears that Betty may have been engaging in an
activity that others of her kind have been doing for quite some time.
To gain a better understanding of
Betty's abilities, the researchers ventured to New Caledonia, an archipelago in
the South Pacific and home to New Caledonian crows. There, they temporarily
captured several specimens and placed them in an aviary. Once inside, the birds
discovered that food had been placed in multiple hideaway spots and required
the use of tools for retrieval. As the team observed, the birds got right to
work using twigs as extensions to reach and retrieve the food. But some also
bent the twigs in very nearly the same way as Betty had done in the video,
which the researchers suggest made retrieval a bit easier.
These findings suggest that
rather than using insight, Betty might have simply been following routines
regularly used by members of her species, though the team notes, it does not
rule out the possibility that she did understand what she was doing while she
was doing it, as did the other birds they observed.
No comments:
Post a Comment