((Left to right: Spencer Henderson, Mike Sizemore and Keri Olson))Every year on Aug. 19, World Photography Day celebrates the art, science and history behind pictures. To celebrate this day, NPR asked readers and listeners to share the story behind their favorite photo they have ever taken. Stratmann’s tip: “Honestly, the best photos are a mix of accidents, luck, and having a curious mind.”A titmouse bird perched on a branch. FADEL: Want your own tufted titmouse image? And if you want to view some of the images from our World Photography Day callout, visit npr.org.