Recently in Africa, the tour guide saw a "strange tree", looked like a gorilla from a distance, and when you look closer, you can see that this is not a large animal, but a huge bird's nest, a group of The weaver bird occupies a dead tree and builds densely packed nests in the tree to give it an eerie appearance.
The nests of the gregarious weavers are so obvious, because African locals rarely destroy the nests on purpose, and the entrances in the nests are all facing down, which is beneficial to avoid sneak attacks by raptors in the air, and also avoid snakes Predators such as crawl into the nest.
But this time the weaver bird occupies a dead tree. As time changes, the dead tree will corrode, or as the number of weaver birds increases, the construction of nests increases and the weight increases, trees will not be able to withstand the giant The weight of the bird's nest is , and it is easy to overwhelm a tree. This situation also occurs.
1. The largest bird's nest in the world Weavers will collect large bird nests made of soil, broken grass and other materials together day and night. The built bird nest can be 6 meters long, 4 meters wide, 2 meters high, etc., and the weight can even reach about 1 ton. A gregarious weaver's nest weighs about 900 kilograms.
A bird's nest can often accommodate hundreds of pairs of birds, up to 500 birds live together, they guard together, and these large bird's nests can accommodate several generations, some super nests in even exist for more than 100 years, , they are not finished Lost once, but a permanent bird's nest.
On the African savannah, few people will dig out such a nest, maybe they are not interested in the gregarious weavers the size of sparrows, so there is no human interference, The nests of gregarious weavers are being built more and more The bigger the .
Second, the big nest of the weaver bird is a delicate place
There is no human disturbance, The gregarious weaver bird builds the nest is exquisite enough to deal with the predators of the food chain , occasionally there are golden cobra and other snakes crawling Entering the nest to prey on the eggs of chicks, etc., but the entrance of the nest of the weaver bird is open downward, which is not conducive to snakes crawling. Poisonous snakes can successfully attack once or twice, but they cannot permanently occupy the bird's nest and turn it into a snake's nest.
Weavers also have calf-protecting . In order to protect the nest, the gregarious weavers will attack collectively. This group's attack force is enough to knock the poisonous snake from the nest to the ground and successfully protect the nest.
The structure of the weaver bird's nest can not only prevent the attack of raptors and snakes, etc., can also adapt to African weather changes , the nest in the central area has a thermal insulation function and is used for perching at night, and the outer nest is used for sunshade and heat insulation during the day. With a more comfortable temperature, the most important thing is that in such a large bird's nest, each pair has its own unit room, allowing the gregarious weavers to continue the development of the population. The population is relatively large and has become a common bird in South Africa.
pay attention to six-dimensional nature, let it flow and understand nature!
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