Posts Tagged ‘Odonata

03
Jul
10

Fly Fishing: Damsels Habits & Habitat

“They tend to creep around the bottom of ponds and streams searching for prey. When a nymph is about to molt into an adult it crawls out of the water. Dawn or dusk during fine weather is the most common times for molting. There are usually 10 – 15 molts as nymphs. It can take nymphs from 1 to 5 years to mature depending on species.

Before mating the male must transfer sperm from the genital opening on segment 9 to the reproductive organs on segments and 3. Then on finding a female he grabs her by the neck with his claspers. She curves her body around until the tip of her abdomen touches his reproductive organs in segment 2 and 3 to collect the sperm. This is known as the copulation wheel. After mating the pair may fly in tandem with the male leading. Females mate with more than one male and store the sperm from the matings, although she tends to use the sperm from the last mating. The male mating organ contains a structure that allows him to scrape or push aside the sperm from previous matings before depositing his own in the most favorable spot.”   Bumblebee

DAMSEL FLIES

Damsel's Delight



13
Feb
09

damsel flies (delicate amongst the reeds)

Damsel Adult by Seabrooke

Damsel Adult by Seabrooke

“Because they’re predatory, both damselflies and dragonflies have excellent eyesight. They have a pair of large compound eyes that are their primary means of detecting prey, but also several occelli across their “forehead” that they use for sensing small changes in light and dark, which helps them to orient upwards. The eyes are another useful feature to separate damsels from dragons – the compound eyes of the latter meet at the top of the head, while those of damselflies are usually widely separated. The eyes are also very important for avoiding predators.”

http://themarvelousinnature.wordpress.com/2008/06/22/emeralds-in-the-garden/




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