Dragonflies are a colourful and often highly visible component of invertebrate biodiversity in the tropics. Many residents of the tropical Australian city of Darwin believe that the appearance of large numbers of dragonflies heralds the end of the Wet season. However, there has been little scientific information available to support this theory. This project combined the people power provided by citizen scientists with the usefulness of new technologies (digital cameras and a smart phone app) to investigate this theory. The project ran as a photo competition for four months, from April to July, 2017, covering the transition from the northern Australian Wet season to the Dry season. A website was created and citizen scientists were invited to submit photos with the date and location of each specimen recorded. Monthly prizes were awarded for both the best image and a random pick. A free app, 'Identifly - a guide to the dragonflies and damselflies of the Top End', was available to help participants identify the specimens photographed (although identification was not a condition of entry). Over 2,000 images were submitted by 222 participants, a response that far exceeded expectations. The largest change recorded over the study period was in the relative abundance of species. Common gliders, wandering gliders, graphic flutterers and green emperors dominated the skies, particularly near the coast, in April and in May (the official start of the Darwin Dry season). Very few images of these species were submitted in July. Instead, damselflies, equally spectacular, but much smaller, became the dominant species in the image set. The resulting database of images provided information that would have been impossible to obtain by a lone researcher. Additionally, the large numbers of dragonflies and damselflies recorded suggests that wetlands in this region of northern Australia are in good condition.