How to Photograph Ghosts
![Egrets gather on a floodplain in Danube-Drava National Park, Hungary.](/sites/default/files/styles/sierra_full_page_width/public/sierra/articles/big/2015-11-Last-Words-Egrets-WB.jpg.webp?itok=h9ebvknQ)
Photo by Réka Zsirmon/KUDICH-ZSIRMON Photography
Egrets gather on a floodplain in Danube-Dráva National Park, Hungary. Photographers Zsolt Kudich and Réka Zsirmon used a two-second exposure to capture the speed of airborne birds and the stillness of those on the ground.