See some of September's most popular photos

 FLOCK OF FLAMINGOS 

Greater and lesser flamingos rest and eat in the shallow waters of a small pond in Tanzania. Greater flamingos are taller and paler in color, while lesser flamingos have shorter legs but darker coloring. 

 LIFTOFF 

A SpaceX Falcon 9 rocket carries the Commercial Resupply Service 15 mission, which was contracted by NASA, to the International Space Station. Your Shot photographer Tammy Neufeld commented, "This is such a beautiful shot of a stark landscape and a technical subject moved into a poem of light and movement." 

 STRIKING GAZE 

An uncommon blue-colored island pit viper strikes a cunning pose. "This bright snake caught my eye immediately and I love how it contrasts with the lush background. What a cool creature!" commented Your Shot photo editor Kristen McNicholas.