Gray-headed Honeyeater Ptilotula keartlandi

Medium-sized honeyeater found in woodlands and rocky areas across northern inland Australia. Olive brown above, yellow with diffuse gray streaking below, with gray crown and dark gray cheek patch bordered in yellow, and entirely black bill during breeding season. Base of lower mandible (and adjacent gape) yellow in nonbreeding season. Calls include a variety of chirruping rolling whistles, a loud single squawk, and short yelps.