We spent the morning of Sunday, January 15, 2012, birding along a small tributary (Tapara Creek) of the Amazon below the main confluence of the Ucayali-Marañón Rivers. Brad photographed a Lesser Yellow-headed Vulture, Cathartes burrovianus, as it flew alongside our skiff. All Cathartes have a well developed sense of smell and can detect carrion that is hidden by vegetation. The adult has a yellow head, white shafts on the dorsal surface of the outer primaries, and black plumage. It rocks from side to side as it flies low over marshes and grasslands. Temperatures were in the mid-80's on this humid morning with overcast skies.