Rhynchaeites (Greek for "beak fossil") is an extinct genus of wading bird, a stem-group threshkiornithid, from the Eocene.

[1] The potential leg bone fossils of Rhynchaeites have also been found in the earliest Ypresian Fur Formation in Denmark.

It has been hypothesized that the supposed parrot relative Mopsitta tanta, known from a single humerus bone, is the same bird as the leg fossils and thus actually belongs in Rhynchaeites too.

[1][3] Despite its close resemblance to modern ibises, Rhynchaeites differs in several aspects of morphology from them, primarily in its much shorter legs and the apparent lack of any sensory nerves in its bill.

The latter suggests that Rhynchaeites primarily relied on sight to find food, as opposed to the tactile probing of modern ibises.