BP 9 Elias Malouf
Location of Collection
Beaver Pond located on Georgia Gwinnett College Campus
Date of Collection
Shannon-Wiener Index of Biodiversity
Distinguishing Morphological Features of Order
- Eyes tend to be separate in nature.
- Damselflies have four large membranous wings of nearly equal size.
- Wings are usually clear however, some species have black or red coloration in the wings.
- Damselflies have long thin bodies.
- Bodies are sometimes brightly colored with green, blue, red, yellow, black or brown.
- Damselflies have oblong heads with bulging eyes and very short antennae.
- Wings of most damselflies are held along, and parallel to, the body when at rest.
- The hindwing of the damselfly tends to be similar to the forewing.
Enallagma sp. BOLD:AAA2218 Common name: Damselfly
- Often times damselflies are restricted to cool streams or rivers, others to ponds or still clear waters, and some to marshy places.
- Some species are widespread while others are highly local in their distribution.
- Species in the family Coenagrionidae can commonly be found around ponds and streams.
- Damselflies can be found mainly near shallow, freshwater habitats.
The Egg Stage
- After mating, the adult damselfly lays her eggs in a protected area in the water.
- The eggs are about 1 mm long and cylindrical, and are laid in clutches of a few hundred to a few thousand.
- Depending upon the species, the eggs hatch in about one to three weeks.
The Nymph Stage
- This stage is typically an aquatic stage for the damselfly.
- After hatching, the nymph damselfly is 1/4 inch long.
- The nymph has a slender body and long legs of the adult, but does not have wings.
- Three external gills are located at the end of its body that look like a tail.
The Adult Stage
- As adults, damselflies range from about ¾ inch to 1 ¾ inch, depending upon the species.
- As adults, damselflies live between about three weeks and about seven months, depending on their species.
- Shorter-lived damselflies are sexually mature a few days after they emerge from the nymph stage.
- Longer-lived damselflies aren't sexually mature for a few months. As soon as they are sexually mature, damselflies return to the water and mate.
- The adults mate over the shallow water, sometimes in flight but often while clinging to the exposed portions of weed beds or shoreline vegetation.
- The females may lay a few clutches of eggs during their lifetimes.
What it eats
- As nymphs, damselflies eat small aquatic animals such as insects, mosquito larva and even small fish and tadpoles.
- Adult damselflies eat small insects like mosquitoes, flies and aphids.
- Damselfly nymphs are hatched in shallow water and tend to stay in the shallows among weed beds where food is plentiful.
- Damselfly habitats consist of running water but are seen to prefer the marshes, ponds and lakes.
- They usually stay in shallow clean water but may be found to depths of 35 feet.
- The damselfly nymph ranks as the sixth most importance food source for trout.
- Due to their low predatory position on the aquatic food chain, counts of Odonata populations are useful for determining the health of aquatic ecosystems.
Economic, Agricultural, & Human Health Importance
- Odonate larvae are sometimes used as bait by fishermen, and adults are a minor food item in some countries.
PCR product: Gel Pictures
E = Empty well
L = Ladder
(+) = Positive control
(-) = Negative control
9 = Organism BP9