Apparently animals and even avians are more intelligent than they were thought to be so. Take the strange case of zebra finches which chirp in front of their eggs to allow hatching babies to face the heat.
It looks like human beings are not the only animals on the planet to engage in some baby talk with their little ones. Australian zebra finches sing to their eggs before they hatch.
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The purpose of this act of parental warmth is to allow the baby hatchlings to adapt to the global warming that is rampant today. These zebra finches could be seen singing to their babies inside their shells when the weather was a sultry 78 degrees Fahrenheit.
The time period took place towards the final days of incubation. It was five days before the eggs were due to hatch that the zebta finches began warbling to their young ones.
Also the singing grew in volume and urgency as the hatching time came closer and closer. Some scientists had a hunch that the birds were talking to their unborn babies inside the eggs. The study involved noting down the patterns of calls these birds engaged in inside an aviary.
Then the songs were replayed. One set of calls were from parent birds to their unhatched young ones in warm weather and the other set of calls were by zebra finches to their eggs in an incubator.
The chicks in the eggs that were called to in hot weather emerged as tiny and slow in contrast to other hatchlings. This smaller size was an advantage in the sweltering heat since they can cool down in an easy way. These songs tend to influence the growth of the baby finches. Thus the songs serve a utilitarian function.
The chicks that emerge from their eggs are more likely to be able to survive the sheer heat and soaring temperatures that surround them, acording to BBC. The finches may be using songs as a sort of language to warn their unborn babies about what they will have to face once they emerge from their eggshells.
This singing behavioral repertoire goes a long way in its effects. Besides influencing nestling tactics, it also ensures reproductive capabilities not to mention the milieu temperature preferences of the babies when they become full-fledged adults.
Furthermore, the chicks which were sang to by their parent finches ended up not singing to their chicks in return which is a paradox.
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This study got published in the journal Science.