Birds of Prey

[sanjay]

Eagle eyed birds of prey help scrounging vultures find their dinner

Date: 9-sep-2014, Source: Trinity College Dublin

Details:
According to zoologist, endangered vultures find their food by the help of other birds of prey like eagle, hawk etc. It use social cues from birds of prey to locate food before swooping down in large groups to steal the freshest of 'ready meals.'

Because the location and availability of carcasses is very unpredictable, vultures rely on each other to find food. This new research has now revealed that they also use cues from scavenging Tawny and Steppe Eagles, whose keen eyesight and sharp beaks means they are better equipped to spot carrion from the skies and eat it when they land. This finding adds an extra consideration to the mix with regard to how we must design interventions to conserve vultures.

"We filmed interactions between eagles and vultures feeding at animal carcasses and our videos confirmed that eagles use their keen eyesight to find carcasses first, while the vultures simply 'scrounge' this information by following them to the carcasses," said Adam Kane, PhD Researcher, who is co-author of the paper that has just been published in the international journal Proceedings of the Royal Society B.

The vultures do not merely follow the eagles to the dinner table, however; they make use of their superior 'food preparation' skills as well. Eagles are able to tear open carcass hides with their strong beaks, but the vultures can't, so they typically wait for the eagles to do the dirty work before bullying them off and tucking in to their dinner.

"That's not to say the eagles are the losers here. By arriving earlier, they get their finder's bonus and can continue on with some hunting once displaced; a strategy vultures can't rely on," added Mr Kane.

Crucially, these new insights into the social interactions of vultures and eagles highlight the vital importance of integrated management strategies for conserving endangered vulture species.

Vultures play a key role in many ecosystems as recyclers of dead and decaying biomass. They also provide important services in reducing the risk of exposure to dangerous infectious diseases such as anthrax, and in the absence of vultures, feral and wild dogs that carry rabies can increase in number and pose a threat to humans.

Vulture populations have suffered worryingly dramatic declines in recent years and there is an urgent need for effective management strategies to conserve these important birds with a truly unique lifestyle. No species exist in isolation and the results of this paper highlight the vital importance of taking whole-ecosystem approaches for conserving vulture populations. Reply