Distribution : Worldwide
Size : 16 – 180 mm ( ½ – 7 In )
The larvae of different dragonfly species can take anywhere from six months to seven years to mature. During this aquatic stage in their development , they feed ravenously on other waterbone creatures. This includes other insects and arthropods and even small fish, as well as the tadpoles of various amphibians. They then crawl up the stem of the plant or other suitable structure where they undergo the change into an adult. In this stage they can survive for up to four months. Many dragonflies migrate long distances, and some species such as the Common Green Darner ( Anaxjunius ) assemble into massed groups composed of upwards of hundreds of thousands of individuals. Their powerful flight up to 65km/h (40 mph) allows them to travel incredible distances, and recent studies have shown that they can cover up to 140km (85miles) in a day.