Arabic AR Chinese (Simplified) ZH-CN English EN French FR German DE Japanese JA Portuguese PT Russian RU Spanish ES Ukrainian UK

Wild ducks caught on camera snacking on small birds

Latest news

    Mallard duck eating birdImage copyright Silviu Petrovan/Mihai Leu
    Image caption A mallard duck closes in on a fledgling black redstart

    Wild mallard ducks have been observed attacking and eating migratory birds.

    This has never been documented before and is probably a new behaviour, say scientists.

    Zoologists at the University of Cambridge filmed a group of mallard ducks hunting other birds on a reservoir in Romania.

    Two fledglings – a grey wagtail and a black redstart – were chased and swallowed when they landed in the water.

    Mallards are one of the most abundant types of wild duck, and a common sight in parks and on lakes.

    The duck normally snacks on seeds, acorns, berries, plants and insects.

    It has, on occasions, been seen to eat small fish, but bigger vertebrates are normally strictly off the menu.

    Image copyright Silviu Petrovan/Mihai Leu
    Image caption The black redstart is captured

    Dr Silviu Petrovan noticed the unusual behaviour of a group of mallards while he was out bird watching with friends near a national park in southwest Romania.

    He saw the adult female duck grab the grey wagtail in her beak, and repeatedly submerge it in the water, before eventually eating it.

    A second bird – a fledgling black redstart – then landed in the water, where it was chased by juvenile mallard ducks.

    “The poor bird landed on the water and was screaming and trying to navigate itself out of danger,” said Dr Petrovan. “Then it was almost instantaneously attacked by the mallards.”

    The bird eventually disappeared – assumed to be drowned or consumed.

    The scientists could find no record of mallard bird predation in the scientific literature, which suggests such behaviour is both “very rare” and newly-learned.

    “The mallard was massively struggling to eat that wagtail, presumably because it couldn’t actually tear it to pieces because the bill is flattened – it’s not designed for ripping prey apart,” said Dr Petrovan.

    “Digesting bones and feathers – that’s not something that mallards have really evolved to do.”

    Image copyright Silviu Petrovan/Mihai Leu
    Image caption The unfortunate grey wagtail is swallowed almost whole

    Ducks by nature are seldom aggressive and tend not to enjoy novel food.

    However, mallards in California have been seen to enter the sea to feed on sand crabs, perhaps to find new sources of high-energy protein.

    The same may be happening at the reservoir, which is largely deep-water.

    “Potentially there is quite a lot of pressure for those fast-growing juveniles to get animal protein intake, and therefore they are looking at opportunities to supplement that,” said Dr Petrovan.

    “But, the fact that these individuals seem to have learnt how to hunt birds is pretty extraordinary.”

    The findings are published in the journal, Waterbirds.

    View the original article:

    Follow Helen on Twitter.

    In the same category are

    Didcot signs point to Narnia, Gotham City and Middle Earth Image caption The mysterious signs appeared on the A420 Fictional worlds such as Narnia, Gotham City and Neverland have mysteriously appeared on r...
    Rachel Crooks: Why Trump accuser is running for office Accusing Donald Trump of sexual misconduct, Rachel Crooks has been forceful and persistent. But turning a personal story - and anger against the pre...
    Carpetright and Mothercare shares dive on trading worries Image copyright PA Shares in Carpetright and Mothercare have plunged amid fears about the retailers' futures. Carpetright slumped more than 11% afte...
    School bomb threats: Hoax sent to hundreds of schools More than 400 schools in England have received a hoax email threatening to detonate a bomb on school grounds if money is not handed over, police sai...
    Worboys review: What we have learned Image copyright Met Police Image caption Worboys gave his victims drug-laced champagne before he attacked them Until the two-day judicial review h...
    Australian Grand Prix: Mercedes chief predicts three-way fight for F1 title Mercedes boss Toto Wolff (centre) says drivers Valtteri Bottas (left) and Lewis Hamilton are "reasonably happy" with the 2018 carAustralian Grand Pri...

    Leave a comment

    Your email address will not be published. Required fields are marked *