This little study will only appeal to a few birders familiar with neotropical birds, and sharing my passion for them. As in keeping with my policy, since I love to paint birds from anywhere, but most sales are to customers in North America, Europe and the U.K., for species not from such regions I offer the lowest prices, in this case U.S. $100.00, plus, of course, shipping. It is a portrait showing a male with the yellow knob and wattles at the base of the bill that give the species its name. I wanted to show in detail a bird in full call, which is loud and distinctive; a descending whistle which reminds one of the sound of a bomb dropping in a WWII movie. These birds, a threatened species, are found only in suitable habitat in northern Colombia and through much of Venezuela. They can weigh as much as 3.2 kilograms (about 7 lb.). The plumage is all over a glossy black but for the lower belly and undertail coverts, which are white. Females also have variable white barring underneath, white tail tips, and a distinctive orange iris, but lack the yellow knob and wattles and average a little smaller than the males. The species has a relatively small range, and is in decline from a loss of habitat, which includes gallery forests, and from hunting, as these birds are, like most Gallinaceous birds, sought for their meat. I never particularly meant to sell such studies, field sketches and drawings, but as I near the end of life I realize won’t be using them, some folks like them, and it would be nice to find them a good home rather than winding up hidden in some archives some day.