Crocodiles appeared to rescue a dog that had been chased into a river, and scientists said this unusual behavior could indicate empathy — but others are skeptical.
Scientists in India have observed mugger crocodiles engaging in some strange behaviors, including hunting in packs, using sticks as bait to lure herons and egrets within striking range, showing interest in flower garlands floating in the river and even saving a feral dog that had been chased by other dogs.
"Crocodilians do have a sophisticated suite of behaviors," said Duncan Leitch, a biologist specializing in the neurophysiology of reptiles at the University of California, Los Angeles, who was not involved in the research."But some of these conclusions are using a human definition of intelligence and trying to find that in crocodilians."The new study recorded several instances in which groups of mugger crocodiles swam in circles around schools of fish, creating a vortex.
"Crocodilian sensory systems are incredibly sophisticated. They have a very good sense of vision. Their sense of touch is among the finest in the animal kingdom," Leitch said."They're definitely tuned to picking up signals from their environment. Whether or not this is intelligence in the way that we see crows using tools — it's difficult to say.
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