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That the predation goes against gravity, the prey has powerful muscles that tense against the extraction and the soil is a rough source of friction are reasons why it is difficult for a bird to pull an earthworm out of the ground. The bird employs its beak for pulling and its legs for anchoring. It has to let go, and try all over again, when the length of the exposed worm equals the avian height.

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Q: Why is it difficult for a bird to pull an earthworm out of the ground?
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Why the bird finds it difficult to pull the earthworm out of the ground?

Because if you make Tali kill herself in mass effect 3 it's funny


What direction do setae point?

The setae point backwards. They cling to the surroundings of the worm as it contracts its muscles to pull it along. They are what makes pulling an earthworm straight out of the ground difficult. Think of them as little hooks.


Why is it difficult to pull earthworms from their burrows?

'cos they kinda stick to the ground


Can an earthworm pull ten times its own weight?

no


What way do earthworms often use their setae?

to anchor themselves to the ground when a bird tries to pull them away


What is another way that earthworms often use their setae?

to anchor themselves to the ground when a bird tries to pull them away


Would a plant with a fiberous root system be easy or difficult to pull out of the ground?

Since the fibrous roots are not deep rooted, it is easy to pull out such plants from the ground as compared to those with tap root system.


Why does an earthworm find it difficult to move on a glass?

Because glass is a smooth surface. Worms move by using microscopic hairs on their bodies to provide traction so they can pull themselves forward.


Why do birds pull their wings down when they first take off?

a bird sharply pulls down its wings as it did when it pushed off the ground


Is push up a push or pull?

It is a push and a pull. When you move your body towards the ground, it is a pull. A pull as in a pull to the ground. It is a push when you are moving away from the ground.


Can you pull a hazard stake out when your golf ball is in the hazard?

Yes, you are allowed to pull these out of the ground. But you can not pull OB stakes out of the ground.


Do the setae face the anterior or posterior of an earthworm?

They may possibly face the anterior which explains why there is resistance trying to pull them from the soil.