The Aquamarina moved upriver after lunch on Tuesday, January 17, 2012, and relocated to a point about thirty minutes above the city of Reuqena. We didn't go out birding until late in the afternoon because of heavy rain. Once out, we explored Fosec Creek and ended the day with a long boat ride along a river island to look for Red-bellied Macaws where we found them in a dying Moriche Palm grove. We were headed back to the ship, when I photographed a Hoatzin, Opisthocomus hoazin, that made a noisy "crash" landing in some river-edge foliage. The Hoatzin is a large, peculiar, prehistoric-looking bird of Amazonian lakes and rivers. Likened to an arboreal cow, it feeds on leaves which are then digested in a specialized crop and foregut. Its crest is long and ragged. A red iris stands out against its blue featherless facial skin. Dark brown upperparts are streaked with buff. The primaries are rufous as is the belly. The breast and chest are buffy. Temperatures were in the low 80's with overcast skies, high humidity, and intermittent light rain.