Ogre-Faced Spiders That Hear Without Ears?

Spider

Spiders

?️Are you a person who doesn’t like to have spiders near you, or are you a person who is fine with spiders and is interested in these long hairy insects?

?️Spiders come in many different species and most of them like to catch their prey by making webs that are sticky enough for things like bugs to not be able to escape. But the Ogre-Faced Spider is a species that does it completely differently.

How Do Ogre-Faced Spiders Catch Prey?
?️The Ogre-Faced Spider (Deinopis Spinosa) have the biggest eyes of all the spider species, with the ability to see 2000 times better than we do at night.
?️They also have an acute sense of hearing which they use to catch prey. They hang upside down, then get some string in between their forelegs in a net-like pattern.
?️If they hear a bug walking or flying by, they lunge downward, extend their forelegs in the flash of an instant so that the frame web catches the bug.

Who Needs Ears?
Researchers have thought that spiders couldn’t really hear sounds traveling through the air since they don’t have ears! Rather, it was thought they could only sense vibrations through hairs and receptors on their legs.

??‍?Jay Stafstrom, a sensory ecologist at Cornell University, tried to find out if these spiders could actually hear sound travelling through the air.
?The researchers inserted tiny electrodes into spiders’ legs and brains. They put them into a booth that had zero noises around them, then played sounds mimicking the wing beats of flies, mosquitoes and moths from two meters away.
?️Spiders reacted by getting into hunting position, which proved that they could hear sounds through the air with their long hairy legs.
??‍?George Uetz, another scientist from the University of Cincinnati who studies spiders, said that in comparison to other animals “we don’t know diddly about spiders. They are much more complex than people ever thought they were.”

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