Birds speak a common 'secret' language in different parts of the world to warn about danger

Birds worldwide share a unique alarm call to warn each other about brood parasites like cuckoos. This vocalization, a blend of instinct and learned behavior, has been observed across 21 species globally. Researchers found that playing this call to birds in different continents elicited the same alert response, suggesting a universal avian warning system.

Birds speak a common 'secret' language in different parts of the world to warn about danger
Birds worldwide share a unique alarm call to warn each other about brood parasites like cuckoos. This vocalization, a blend of instinct and learned behavior, has been observed across 21 species globally. Researchers found that playing this call to birds in different continents elicited the same alert response, suggesting a universal avian warning system.