The male Gila Woodpecker has a small red cap. The female and juveniles look similar to the male but lack the red cap. They all have prominent white wing patches visible in flight.
Gilas are hole nesters. They peck holes in cardon cactus until the cavity is large enough to build a nest and lay three to five white eggs. Lots of other birds and even Spiny-tailed Iguanas use these holes to seek protection and nest in.
We always know when these birds are around. A familiar sight and sound in Baja Sur is Gila Woodpeckers flying from place to place squawking and churring and inspecting every nook and cranny.