The hotatzin, aka the stinkbird

"One of this species' many peculiarities is that it has a digestive system unique amongst birds. Hoatzins use bacterial fermentation in the front part of the gut to break down the vegetable material they consume, much as cattle and other ruminants do. Unlike ruminants, however, which possess the rumen (a specialized stomach for bacterial fermentation), the hoatzin has an unusually large crop, folded in two chambers, and a large, multi-chambered lower esophagus. Its stomach chamber and gizzard are much smaller than in other birds. The crop of the hoatzin is so large as to displace the flight muscles and keel of the sternum, much to the detriment of their flight capacity. Because of aromatic compounds in the leaves they consume and the bacterial fermentation,[12][13] the bird has a disagreeable, manure-like odor and is only hunted by humans for food in times of dire need."

https://en.wikipedia.org/wiki/Hoatzin


haggadah Section: -- Cup #2 & Dayenu