Dragonflies lay eggs directly in water or aquatic plants. Larvae hatched from eggs are called hydra. Hydra often sticks out its hooked lower lip to catch small animals in the water for a living.
Hydra is an expert in swimming. It adopts jet type. As long as you compress your abdomen and spray water backwards, your body will naturally rush forward at a very high speed. Breathe through the rectum, trachea and gills. When Hydra grows up, it climbs the branches or stones protruding from the water and becomes an adult dragonfly like a dragon.
Extended data
Life habits of dragonflies
Dragonflies like wet environment, so they usually fly in ponds or rivers, and their larvae (larvae) also need to develop in water.
Odonata is a semi-metamorphosed insect, which has only three stages in its life: egg, larva and adult. Adults often lay eggs in water by skimming. Larvae, also known as hydra, preys on other aquatic organisms in the water, climbs out of the water before emergence, mates and lays eggs, and completes its life history.
Some kinds of female dragonflies will use an extreme strategy to avoid unwanted suitors: they will fall from the sky and pretend to be dead.
Dragonflies not only prey on other insects, but also have the habit of adults eating each other among species. When they prey, they will catch their prey fiercely, and there are a lot of coarse hairs on their feet, which can help them catch their prey and make it impossible to escape. The mouth is also quite developed, it can bite prey, facilitate eating, and can eat up food equivalent to its own weight within 30 minutes.
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