How do dragonflies mate?
Dragonflies are the general name of dragonflies and dragonflies. Adults usually fly in ponds or rivers to prey on flying insects. Larvae (juveniles) develop in the water and are completely aquatic. Their morphology and habits are completely different from those of adults. The morphology of different species of juveniles is very different, and the mating posture of dragonflies is also very unique. Let's take a look at how dragonflies mate.
How do dragonflies mate?
Mating begins when the male catches a female who is willing to mate. First, the male will bend the abdomen and use the intersecting process of the anal appendage at the end of the abdomen to grasp the dorsal plate of the female's head or chest. The male then loosens his grip on the female, allowing the female to hang easily at the end of the male's abdomen. The female will bend her abdomen to make contact and press the end of the abdomen against the second sex organ of the male. The male then removes all the sperm that the female left in the body during past mating, and then uses penile organs to place his sperm in the female.
How do dragonflies lay eggs?
After mating, the female of a dragonfly lays eggs immediately or after a few hours or days, there are two ways to lay eggs. The species with well-developed ovipositors lay their eggs in or on the plant tissue in the water, and some climb under the water to lay eggs, which can be immersed in water for more than an hour. During spawning, some females are "strung together" by males clutching the back of their abdomen, while others lay eggs without male grasping. Many males, even if they do not hold on to the female, protect them when they lay eggs in case other males become interested in the female.
Why do dragonflies need some water?
Dragonflies usually lay their eggs on aquatic plants in small rivers and ponds. The larvae hatched on aquatic plants after ovulation are called "water flies". Water flies have to crawl in the water for a long time, at least one year, or seven or eight years before they can become adults of dragonflies. After feathering into an adult, the short and fat belly becomes more and more slender, and the previously folded wings spread out one by one, and finally become a dragonfly like a small airplane. It can be seen that "dragonfly scratching the surface" is a natural part of dragonfly life-laying eggs to reproduce.
Related
- A course of planting techniques and methods on how to grow carrots
- How to plant the latest tulips?
- Is it better to pick tea in the morning or in the afternoon? When is the best time for tea to be picked? what is the third or fifth tea?
- Launch Yuanxiao Happy combination Haocha + Tea Yuan healthy Taste
- Penghu Tourism "Fireworks 20 Parade with You"
- 2022 West Lake Happiness holds "Digital Revitalization Voucher" and draws iphone13 and laptop.
- Banqiao Fuzhou social houses are designed to change start-up combined with police elimination to create a safe and livable environment
- The convenient measure of "mechanical weeding" in Xinbei has been abused and the Agriculture Bureau has imposed heavy penalties on the illegal land consolidation.
- Changgeng University Joins Hands with Four Memory Factories to Rescue Memory Talent Shortage
- The list of Taiwan's top 100 MVP managers is listed by the Director-General of the Farmers' Association of Sanxia District.