However, the ability of sheep to identify faces was unclear.
Researchers trained eight sheep to identify celebrity faces from photographs.
The team got success after few days of tutelage of sheep at the Cambridge University in England, where at least 8 sheep could recognize Obama by his picture.
That means the sheep were not just memorizing images, demonstrating for the first time that sheep have advanced face-recognition capabilities similar to those of humans and other primates, say neurobiologist Jennifer Morton and her colleagues.
It's always been known a flock can become familiar with the visages of their human handlers. Past research has shown that horses, dogs, and even mockingbirds can discern between individuals of other species. Then, during the trials, the sheep were released into a pen where they had to discern between the familiar faces and an object or an unfamiliar face.
Oreo Android 8.0 Beta will soon be available for Samsung gadgets
Samsung calls the program the Samsung Experience 9 .0 beta , referring to its Android-based system previously known as TouchWiz. Two of the best Android smartphones on the market will be betting an update to Android 8.0 Oreo in the not-too-distant future.
The sheep in the experiment have to decide which face is going to reward it with food.
The sheep still recognized the celebrity portraits, even if posing at an angle, with only a 15 percent drop in accuracy. Since the handler cares for the sheep daily, the animals were familiar with her - although they had never seen a 2-D photo of her face.
Next, the sheep were taken into the barn and shown two photos. Scientists now found that that ability can be applied to photos of famous faces, too, Sky News reported.
Obviously the study focused on only eight domestic sheep, and it does mention some potential alternative interpretations of the data. "Either the human face is similar enough to the sheep face that [it] activates the sheep face-processing system, or human-face recognition relies on more general-purpose recognition systems".