"The story of the goshawk, a bird of prey that has advanced into the city"
From July 2017 to December 2018, this blog introduces the life of the Goshawk, a wild drama that unfolded in front of the manager in an urban park.
A female that continues to repair the nest
In the forest of the park where the goshawk chose to breed, an unexpected inhabitant came just a stone's throw away.
This time, I will take up the situation at that time.
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A female who continues to repair the nest to make it a more comfortable place.
Whenever there is a part of the nest that they don't like, they always reshape it, and when they see that there isn't enough material, they go out looking for nest materials.
In order to succeed in breeding, they must pay particular attention to the nest and try to ensure its perfection.
It must be an action that comes from fully aware that even a small thing can become fatal in the future.
Just as the goshawks were getting ready to lay their eggs, a nearby raptor neighbor came. I'm also ready to start breeding.
The neighbor who came is a small bird of prey, Tsumi.
I've been observing the goshawks by flying around them for a while.
They must have scouted here and there looking for breeding grounds.
Of course, Tsumi chose this place knowing that there were goshawks here and that they were breeding.
Crows are constantly being chased away by goshawks, so there aren't many crows around here, and there aren't many crows.
Tsumi must have drifted to this place because there were many crows in other places and decided that it was unsuitable for breeding.
Even the goshawk is no match for the agile Tsumi in aerial combat.
The goshawks also seem to have noticed that the tsumi are about to start breeding.
The goshawk came to scout the Tsumi, who had just arrived.
When a goshawk comes near, the tsumi does not keep silent and tries to scare the big goshawk away with its small body.
The Tsumi is very small, but in terms of agility, it surpasses the Goshawk.
In an aerial battle, Tsumi gains the upper hand, and the goshawk often runs away.
Tsumi are birds of prey with sharp beaks and claws.
A goshawk running away while watching the situation with a sideways glance.
A goshawk scurrying past a tsumi in the woods to reconnoitre
The goshawks can't help but worry about the fact that the same raptors are trying to breed because they're so close.
Anyway, it seems that they are trying to confirm whether they are harming their breeding or not.
The goshawk sees an opening and passes right by where the tsumi is perched. Of course, the role of reconnaissance is male.
Both goshawks and black-tailed raptors are carnivorous and both prey on birds, but the size of their prey is slightly different.
Tsumi is the size of a sparrow, and Goshawk the size of a pigeon.
If they target different prey, they won't interfere with each other's food, and even if they don't get along, they'll be able to overlap each other's territories.
The birds are paired and the pairing seems to be almost decided, but sometimes another bird tries to come close to the two birds.
Then the male drives it away.
It seems that there are still males who are still attached to this female.
Tsumi gathers nest material, the method is the same as the goshawk, and it does not pick up branches that have fallen to the ground
In the case of Tsumi, is it the female's job to collect nesting materials?
It is the female who carries the nest material exclusively. You can tell it's a female because of its yellow eyes.
Immediately carry the broken branches to the nest under construction
Small tsumi, about the size of a pigeon, is the smallest bird of prey found in Japan.
Because of their small size, nests can be small, and the time required to construct a cage is short, and the time required for breeding is very short.
Everything the goshawk has been preparing for since the end of last year comes around the time the goshawk lays eggs, and everything is done.
Being small seems to have some advantages.
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to be continued
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"Urban goshawk, record of breeding" 14, preparation for breeding of blacktail
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