Brazilian pumpkin cubs can't hear the same kind of cry

frogs and dragonflies often rely on sound to find mates, and their ears are able to distinguish the unique sounds of their species. When researchers played their sounds in the wild, the two pumpkin cubs, about 1.5 centimeters long, couldn't hear their own high-frequency sounds, a team of biologists said in a recent report published in
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to understand what was going on, the researchers conducted hearing sensitivity tests in the lab, which showed that the brains of the crickets did not respond to the same mating calls. Anatomical results show that, similar to several species of salamanders and eels that cannot make sounds, the ears of these dragonflies are not fully developed.
This is the only animal case in which the sounds of similar species cannot be distinguished, and scientists speculate that the dragonflies retain the ability to sing because movements such as sacs provide visual clues to potential mates.
are their predators? Ground-foraging birds such as the crown (made in Central and South America) can still hear the call of pumpkin cubs. But the bright colors of these moths indicate that they are poisonous enough to deter predators. (Source: Science Network Feng Weiwei)