Showing posts with label Odonata. Show all posts
Showing posts with label Odonata. Show all posts
Saturday, April 18, 2015
Wednesday, February 4, 2015
Portrait (Damselflies)
The portrait of a male Blue-tailed Damselfly. This damselfly is about 3 cm long, so for this shot I used for the first time all the extension tubes combined, 7mm, 21mm and 31mm. Notice the reddish dot between the compound eyes. This is the ocelli, it is an extra eye, only this eye is single and not compound!
Labels:
Almyros River,
Blue-tailed Damselfly,
Crete,
Damselflies,
Heraklion,
Insects,
Ischnura elegans,
Macro,
Odonata,
Αλμυρός Ποταμός,
Έντομα,
Ηράκλειο,
Κρήτη
Thursday, January 22, 2015
Wednesday, January 21, 2015
Damselflies - Cretan Bluet
The first (and only up to now) Cretan Bluet that I have seen. Cretan Bluet is an endemic species in the island of Crete, Greece. According to the "Field Guide to the Dragonflies of Britain and Europe" of Dijkstra & Lewington, the flight season fot this species starts from mid May, but I made this observation on March 18 of 2013!
Labels:
Coenagrion intermedium,
Cretan Bluet,
Crete,
Damselflies,
Endemic species,
Insects,
Odonata,
Ενδημικά,
Έντομα,
Ηρακλειο,
Κρήτη
Wednesday, January 14, 2015
Tuesday, January 6, 2015
Saturday, January 3, 2015
Saturday, December 13, 2014
ID - Red veined Darter - Immature male VS female
A common problem when trying to identify odonata species (both Damselflies & Dragonflies) is that immature males of a species often look quite similar to mature females, which can become very misleading. The easiest way for a fast and accurate identification is the observation of reproductive structures, such as the male secondary genitalia and appendages or the female ovipositor or the vulvar scale. However, in many cases this becomes difficult due to their small size or a not so suitable angle between the subject and the observed. In this cases coloration might become a better index for the identification. Here I will try to point out some differences between immature male and mature female red veined darters (Sympetrum fonscolombii).
This is a mature female individual. The abdomen's coloration, with the two black stripes running the ventral part of the abdomen, is characteristic for the females.
A better view of the female abdomen.
Now this is how an immature male looks like. The general similarity with the female is more than obvious, however the specific pattern in the abdomen is missing. Moreover, if you give a better look under the base of the abdomen (S2) you will notice a slight "swelling" which is a male's reproductive structure enabling him to transfer sperm to the female, the so called secondary genitalia.
Eventually, the immature male will start to become mature and change his colour to red. This is how this procedures begins. As you can see the dorsal of the abdomen has already turned red, and the rest of the body will follow.
Thursday, December 11, 2014
Damselflies - Migrant Spreadwing
Some days out in the field can be very poor. This is what happened to me on July 22, when I went out to photograph Dragon- and Damselflies and for the first hour I would only encounter the common and over-photographed Common Blue-tails. But then my luck changed and I saw one individual of a different speceis...which was this Migrant Spreadwing, (Lestes barbarus) a new species for me! Photographic from a distance at the beggining, and then getting closer step by step.
Labels:
Crete,
Damselflies,
Heraklion,
Lestes barbarus,
Macro,
Migrant Spreadwing,
Odonata,
Ηράκλειο,
Κρήτη
Tuesday, December 9, 2014
Monday, December 1, 2014
Wednesday, September 11, 2013
Tuesday, July 16, 2013
Thursday, July 11, 2013
Sunday, November 18, 2012
Sunday, October 28, 2012
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