Size doesn't matter: Parrots, crows as smart as apes despite much smaller brains
While ape brains weigh 275 to 500 gm on average, birds, who are just as skilful despite lacking a cortex, only manage five to 20 gm
London: Despite having much smaller brains than mammals, some birds like parrots and crows have mental skills that match with those of our ape cousins, new research has found.
Among other things, they are capable of thinking logically, of recognising themselves in the mirror and of empathy, the study said.
"The mental abilities of corvids and parrots are as sophisticated and diverse as those of apes," said one of the researchers Onur Gunturkun from Ruhr University Bochum in Germany.
The findings were published in the journal Trends in Cognitive Sciences.
In mammals, cognitive skills are controlled by the multi-layered cerebral cortex, also called neocortex.
This brain structure does not exist in birds. Instead, complex mental tasks are managed by the so-called pallium.
Moreover, birds have much smaller brains than apes. While ape brains weigh 275 to 500 gm on average, birds, who are just as skilful despite lacking a cortex, only manage five to 20 gm.
"How, then, are birds capable of the same cognitive performance as apes?" Gunturkun asked.
To address this question, the researchers compiled studies which had revealed diverse cognitive skills in birds and analysed numerous neuro-anatomic studies.
They found that brains of birds and mammals have some similarities.
Single modules of the brains, for example, are wired in a similar way, and both animal groups have a prefrontal brain structure that controls similar executive functions.
It is not known how these similarities have evolved.
The researchers believe that either their last common ancestor passed the neuronal basis to birds and mammals or — and the authors consider this more likely — they evolved independently of each other, because both animal groups faced the same challenges.
According to the researchers, this would mean that certain wiring patterns in the brain are necessary to boost cognitive performance.
"What is clear is that the multi-layered mammalian cortex is not required for complex cognition," Gunturkun noted.
"The absolute brain weight is not relevant for mental abilities, either," Gunturkun said.
Find latest and upcoming tech gadgets online on Tech2 Gadgets. Get technology news, gadgets reviews & ratings. Popular gadgets including laptop, tablet and mobile specifications, features, prices, comparison.
With AI-systems as matchmakers, in the coming decades it may become common to date a personalised avatar.
Although animal Husbandry and Dairying Minister Giriraj Singh said there have been no scientific reports on transmission of bird flu to humans and consumers should not be scared, prices and demand for poultry and eggs has fallen in several states.
Bird flu: Delhi govt orders reopening of Ghazipur poultry market after all samples test negative for avian influenza
Delhi govt on Thursday said that samples from 100 chickens in the poultry market tested negative. The market was temporarily closed after an outbreak of bird flu among crows and ducks in the city