Fulica atra (Linneaus 1758) is the extant coot, a small water bird with large fleshy feet. Here it nests with Heliornis a sungrebe. The ascending process of the premaxilla spreads laterally beneath a frontal shield, a decoration on the forehead.

Heliornis fulica (Boddaert 1783) is the extant sungrebe, also known as the marsupial bird for the pouch under the wing males have to carry their young. This grebe mimic and duck mimic is not related to either, but is related to Fulica. These two are the only water birds derived from the land bird clade.

Boddaert P 1783. Table des planches enluminéez d'histoire naturelle de M. D'Aubenton : avec les denominations de M.M. de Buffon, Brisson, Edwards, Linnaeus et Latham, precedé d'une notice des principaux ouvrages zoologiques enluminés (in French). Utrecht. p. 54, Number 893.

Linnaeus C 1758. Systema naturæ per regna tria naturæ, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata.

wiki/Fulica
wiki/Sungrebe-Heliornis