Just before Monsoon, these fireflies congregate in certain regions of India and on a few special trees like this one, they are in crazy quantity which can range in the millions. This particular image is a stack of 32 images (30 seconds exposure each) of this tree taken on a tripod. Later the images were stacked in Adobe Photoshop. This image contains 16 minutes of viewing time of this amazing tree. [Prathamesh Ghadekar, India]