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Common darter: Difference between revisions
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== Introduction == | == Introduction == | ||
Libellulidae is the largest family in the order. They have dark spots on the wings. | |||
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[[File:example.jpg|thumb|150px|left|Description]] | [[File:example.jpg|thumb|150px|left|Description]] | ||
For human, they added to the wonder of nature. They feed on large numbers of small flying insects. They catch and eat honey bees. | |||
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== Facts == | == Facts == | ||
1. Dragonflies used as medicine in Japan and China and also a food source, eaten as adults or larvae 2. The compound eyes of some dragonflies have up to 28,000 facets 3. Some naiads can shoot their labium and catch prey in only 25 milliseconds 4. Females will mate only with males that hold a territory 5. Most dragonflies’ naiads can move forward by “jet propulsion” 6. The life span is short, some of them are no more than a week or two, but exceptionally are 6-8 weeks. Adults form is most active between mid-morning and mid-afternoon, when the temperatures are up to the highest | '''1.''' Dragonflies used as medicine in Japan and China and also a food source, eaten as adults or larvae '''2.''' The compound eyes of some dragonflies have up to 28,000 facets '''3.''' Some naiads can shoot their labium and catch prey in only 25 milliseconds '''4.''' Females will mate only with males that hold a territory '''5.''' Most dragonflies’ naiads can move forward by “jet propulsion” '''6.''' The life span is short, some of them are no more than a week or two, but exceptionally are 6-8 weeks. Adults form is most active between mid-morning and mid-afternoon, when the temperatures are up to the highest '''7.''' Most of the life of the dragonflies are spending their life in larval form, beneath the water surface, using internal gills to breathe, and using extendable jaws to catch other invertebrates '''8.''' The larvae of large dragonflies may live up to five years | ||
== Reproduction == | == Reproduction == | ||
The larvae sit in water near the margin for several days to get ready for their final molt and | The larvae sit in water near the margin for several days to get ready for their final molt and start changing the breathing pattern inside the larva's body. The larvae climb up to find a secure spot then the skins slit on a weak point located behind the head. First, they push the thorax, head, legs and wings out of the larval skin then they pause about 30 minutes to let the legs harden enough for the next stage, which is when the abdomen is back out. The wings and abdomen are expanded and start to become solid. After a while, adult will have hardened wings so they could start a flight. | ||
== References == | == References == | ||
