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Baby birds can communicate before they break out, says study

It sounds like one of those mysterious, explanatory things that animals do, but a few researchers from Vigo University in Spain explained a very specific behavioral pattern and found it to be in the direction of & # 39; e development of the birds changes.

The researchers study 90 yellow feet, divided into "clutches", which is a term for all eggs in one nest. They separate some eggs in a clutch and play adult gold warning calls. As a result, the pats began to move.

"Gold embryos change their mobility when exposed to alarm calls broadcast by adults, an effect that vibrates the egg," says the study, published in the journal Nature, Ecology and Evolution.
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Here it really becomes interesting: Do this & # 39; then these eggs were reintroduced to the rest of their mates, who were busy developing in relatively silence, it seems they somehow information – namely, that a type of danger in & # 39; e neighborhood – transferred to those who did not hear the warning calls.

This knowledge transfer was evident in the way the clutch sizes developed. Clutch those no members exposed to alert calls other than whole links that have few members exposed to calls.

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"In general, we found that alarm call exposure had strong programming effects on embryonic development, and that these effects were transmitted under embryos that belonged to" "the same experimental link , "the authors wrote. "Embryo & # 39; s tags show off breaking in & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & gt;

The effects remained after birth

You may ask yourself what good a warning bird's vibration warning would be for its unmarried brothers and sisters, all of whom are completely vulnerable and cannot properly protect themselves as a danger. Researchers found that this communication changed the way birds developed and their behavior influenced after they brought it.

Chicks from "exposed links" were rapper to crawl to adult alarm calls compared to chicks from a control group, regardless of whether they were manipulated or not. "

That with other words, links that were deliberately thought of danger developed them to birth adequately.

It makes sense that puppy birds can listen and respond to danger, while still developing in the egg, just as human dolls can sense and react to sounds while in utero. But the way it affects their development and behavior is a fascinating boundary. The researchers say the next step is to see if various environmental stimuli develop different changes in birds.

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