Dragonfly Camp

This text is mainly a translation of the text Aktivitets och undersökningstips in Trollsländor - ett kompendium by Tobias Ivarsson.
I have made minor changes, to make it useful even for non-Swedish odonatologists. "Trollsländor - ett kompendium" is written for youth odonatologists, but I think some part of the text even is useful as inspiration for older odonatologists.

Flying time

Different dragonfly species fly at different times of the summer. Some Swedish species start flying in May but other species are not seen until beginning of July. When the late flying species start flying, some of the early species already have disappeared. Thus all dragonfly species at a place can't be found during a single visit. The best time for seeing many different species are at the turn of the month June/July (southern Sweden). Write down the date for the first and last appearance of the species at your home district, differs the time from year to year?

Inventory

There's still many places in Sweden (and many other countries around the world) badly checked for dragonflies. It's easy and fun to be helpful for the inventory of the Swedish dragonflies. One can just check some lake or stream at random or make an well planned expedition. Buy a map, select an interesting area of that map and check all lakes, ponds, steams and swamps in that area. During such a trip you will get very good knowledge about what species living in that area and what kind of biotope each species prefer. Preferable such expeditions is made by bike or walking. It's much harder to find dragonflies when traveling by car. Find out what species you find, write down species, date, name of water and a description of the way to the water.Please register your findings in artportalen a Internet based reporting system.

Territory fights

Male dragonflies often keep territories where they fly around and keep other males away. The size of the territories differs depending on area and species. The territories of males are perfect for studies. Investigate for example those questions:
Knowledge about the territory can be used for photography and catching as the dragonflies fly along the same paths, find such a path and wait for the dragonfly with your net or camera.

Lifetime

How old can a dragonfly be? How far can it fly?
Such questions can be answered by marking the individuals. Catch the dragonfly and mark the wings with a permanent marker. Recatching the dragonfly will answer your questions. Be very careful while doing this, injury of the dragonfly might decrease the lifetime and your examination date will be faulty. Don't catch and mark rare dragonflies.

Collections

There's a few ways of collecting dragonflies, catching and killing male ones are one bad method. I think living dragonflies are nicer than killed dragonflies! The dragonflies often lose the nice colors as dead. On better alternative is to collect exuvier, empty larva skins. Exuvier are found at straws and stones at the shore. The exuviers can be determined to species using some book with a larva key.

Raising

Raising of dragonfly larvae are very interesting, it's quite hard but I've tried. My results and ideas are found here.

Sex

Dragonfly sex is very fascinating and gives you many opportunities for studies:

Page updated June 21 2008
Copyright 2004-2008 Martin Peterson