Woodpecker are usually found in the forest and river reed of our country. There are 630 species in the world and there are 6-7 species are living in Mongolia. The biggest in our country is the black woodpecker (Dryocopus martius).
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In males, the entire crown is red, but in females only the top hindcrown is red with the rest of the body all black. Interestingly, they had unique shaped eye pupil.
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The great spotted woodpecker (Dendrocopos major) is medium sized, nape and tails are red. This is female bird because its nape is not red. It seems that they not often afraid of human.
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This is lesser spotted woodpecker (Dryobates minor). The male has a crimson crown and small sized. In the female the crown is white and they spend most of its time in the tops of tall trees in woods and parks.
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The three-toed woodpecker (Picoides tridactylus) is a medium-sized and they have yellow cap. It is the only woodpecker with a yellow cap and the only one with three toes. The females have not yellow cap.
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Not every woodpecker like to peck the tree. The grey-headed woodpecker (Picus canus) is one of them, they rarely peck the tree. They feed with ants, worms, fly larvae from the surface of the tree in warm weather while they feed with tree nut in cold weather. I met with medium sized grey-headed woodpecker when he was eating tree nut.
In spring time, you can easily approach to the woodpecker by its sound of pecking the tree. The duration, tone and frequency of pecking sound are different and it is the only way to communicate with each other.
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Even they seems to fly from the trees, they usually walk and jump nearby.
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They have extra eyelid protection from sawdust and they have hair in their nose to protect from sawdust.
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How they find the worms from tree?
They find worms by its sound. Thus, they have good hearing too. They prick holes in tree with its neb and use their long tongue to eat the meal. Their tongue are longer than the neb.
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A woodpecker's head experiences decelerations of 1200g as it drums on a tree at up to 22 times per second. Humans are often left concussed if they experience 80 to 100g, so how the woodpecker avoids brain damage was unclear.
The researchers then set out to find artificial analogues for all these factors so they could build a mechanical shock absorbing system to protect microelectronics that works in a similar way.
To mimic the beak's deformation resistance, they use a cylindrical metal enclosure. The hyoid's ability to distribute mechanical loads is mimicked by a layer of rubber within that cylinder, and the skull/cerebrospinal fluid by an aluminium layer. The spongy bone's vibration resistance is mimicked by closely packed 1-millimetre-diameter glass spheres, in which the fragile circuit sits.
As well as a possible role protecting flight recorder electronics, the shock absorber could also be used in "bunker-busting" bombs, as well as for protecting spacecraft from collisions with micrometeorites and space debris. It could also be used to protect electronics in cars.
For more information, click here.
Woodpecker are usually found in the forest and river reed of our country. There are 630 species in the world and there are 6-7 species are living in Mongolia. The biggest in our country is the black woodpecker (Dryocopus martius).
In males, the entire crown is red, but in females only the top hindcrown is red with the rest of the body all black. Interestingly, they had unique shaped eye pupil.
The great spotted woodpecker (Dendrocopos major) is medium sized, nape and tails are red. This is female bird because its nape is not red. It seems that they not often afraid of human.
This is lesser spotted woodpecker (Dryobates minor). The male has a crimson crown and small sized. In the female the crown is white and they spend most of its time in the tops of tall trees in woods and parks.
The three-toed woodpecker (Picoides tridactylus) is a medium-sized and they have yellow cap. It is the only woodpecker with a yellow cap and the only one with three toes. The females have not yellow cap.
Not every woodpecker like to peck the tree. The grey-headed woodpecker (Picus canus) is one of them, they rarely peck the tree. They feed with ants, worms, fly larvae from the surface of the tree in warm weather while they feed with tree nut in cold weather. I met with medium sized grey-headed woodpecker when he was eating tree nut.
In spring time, you can easily approach to the woodpecker by its sound of pecking the tree. The duration, tone and frequency of pecking sound are different and it is the only way to communicate with each other.
Even they seems to fly from the trees, they usually walk and jump nearby.
They have extra eyelid protection from sawdust and they have hair in their nose to protect from sawdust.
How they find the worms from tree?
They find worms by its sound. Thus, they have good hearing too. They prick holes in tree with its neb and use their long tongue to eat the meal. Their tongue are longer than the neb.
A woodpecker's head experiences decelerations of 1200g as it drums on a tree at up to 22 times per second. Humans are often left concussed if they experience 80 to 100g, so how the woodpecker avoids brain damage was unclear.
The researchers then set out to find artificial analogues for all these factors so they could build a mechanical shock absorbing system to protect microelectronics that works in a similar way.
To mimic the beak's deformation resistance, they use a cylindrical metal enclosure. The hyoid's ability to distribute mechanical loads is mimicked by a layer of rubber within that cylinder, and the skull/cerebrospinal fluid by an aluminium layer. The spongy bone's vibration resistance is mimicked by closely packed 1-millimetre-diameter glass spheres, in which the fragile circuit sits.
As well as a possible role protecting flight recorder electronics, the shock absorber could also be used in "bunker-busting" bombs, as well as for protecting spacecraft from collisions with micrometeorites and space debris. It could also be used to protect electronics in cars.
For more information, click here.