Two Scarlet Macaw parrot birds flying.
Those two Scarlet Macaw birds can fly free and are trained to come back to their owner at a voice signal. The birds owner often let them fly around Dolores Park in the afternoon, when it's not too windy. It's amazing to see those beautiful rainbow-colored pet birds fly around and come back to land on their master's shoulder.
For more information about Scarlet Macaw birds, read en.wikipedia.org/wiki/Scarlet_Macaw
Photo taken in Dolores Park (San Francisco)