
Scinax is a genus of frogs in the family Hylidae found in eastern and southern Mexico to Argentina and Uruguay, Trinidad and Tobago, and Saint Lucia. These are small to moderate-sized tree frogs, drably colored. Duellman and Wiens resurrected this genus in 1992. The name originates from the Greek word skinos, meaning quick or nimble.

Scinax acuminatus is a species of frog in the family Hylidae. It is found in Argentina, Bolivia, Brazil, Paraguay, and possibly Uruguay. Its natural habitats are moist savanna, subtropical or tropical moist shrubland, subtropical or tropical seasonally wet or flooded lowland grassland, freshwater lakes, intermittent freshwater lakes, freshwater marshes, intermittent freshwater marshes, pastureland, rural gardens, heavily degraded former forest, ponds, and canals and ditches. It breeds in bodies of water. It is threatened by eventual habitat loss, but the population is currently fairly stable, as it adapts fairly well to human encroachment and development.

Scinax alter, the Crubixa snouted treefrog, is a species of frog in the family Hylidae endemic to Brazil. Its natural habitats are subtropical or tropical moist shrubland, subtropical or tropical seasonally wet or flooded lowland grassland, swamps, intermittent freshwater lakes, freshwater marshes, intermittent freshwater marshes, pastureland, and ponds.

Scinax boesemani is a species of frog in the family Hylidae. It is found in The Guianas, southern Venezuela (Amazonas), and northern Brazil. The specific name boesemani honors Marinus Boeseman, a Dutch ichthyologist. Common name Boeseman's snouted treefrog has been coined for it.

Scinax boulengeri is a species of frog in the family Hylidae. It is found in Colombia, Costa Rica, Nicaragua, Panama, and possibly Honduras. Its natural habitats are subtropical or tropical moist lowland forests, intermittent freshwater marshes, pastureland, plantations, rural gardens, and urban areas.

Scinax crospedospilus is a species of frog in the family Hylidae. It is endemic to Brazil. Its natural habitats are subtropical or tropical moist shrubland, subtropical or tropical seasonally wet or flooded lowland grassland, subtropical or tropical high-altitude grassland, freshwater marshes, intermittent freshwater marshes, pastureland, heavily degraded former forest, ponds, and canals and ditches.

Scinax cruentomma is a species of frog in the family Hylidae. It is found in Brazil, Colombia, Ecuador, Peru, possibly Bolivia, and possibly French Guiana. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical swamps, freshwater marshes, intermittent freshwater marshes, and rural gardens.

Scinax cuspidatus is a species of frog in the family Hylidae. It is endemic to Brazil. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist shrubland, subtropical or tropical dry lowland grassland, freshwater marshes, intermittent freshwater marshes, rocky areas, heavily degraded former forest, and ponds. It is threatened by habitat loss.

Scinax elaeochroa, commonly known as the Sipurio snouted treefrog, or olive snouted treefrog, is a species of frog in the family Hylidae. It is found in the Caribbean lowlands of Nicaragua and Panama and in the Pacific lowlands of Costa Rica and Panama, with an isolated population in Colombia.

Scinax eurydice is a species of frog in the family Hylidae. It is endemic to Brazil. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist shrubland, subtropical or tropical seasonally wet or flooded lowland grassland, swamps, freshwater lakes, intermittent freshwater lakes, freshwater marshes, intermittent freshwater marshes, heavily degraded former forest, and ponds. It is threatened by habitat loss.
Scinax funereus is a species of frog in the family Hylidae. It is found in Brazil, Ecuador, Peru, and possibly Bolivia. Its natural habitats are subtropical or tropical moist lowland forests, intermittent freshwater marshes, rural gardens, and heavily degraded former forest.

Scinax fuscomarginatus is a species of frog in the family Hylidae. It is found in northwestern Argentina, Paraguay, eastern Bolivia, southern, central, and eastern Brazil, and in scattered localities in the lowlands of eastern Venezuela and savannas of Guyana and southern Surinam as well as adjacent Brazil. As currently defined, it is one of most widespread Neotropical frogs; the northernmost records refer to what was formerly recognized as Scinax trilineatus. Common name brown-bordered snouted treefrog has been coined for this species.

Scinax fuscovarius is a species of frog in the family Hylidae. It is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay. Its natural habitats are moist savanna, subtropical or tropical moist shrubland, subtropical or tropical high-altitude shrubland, subtropical or tropical dry lowland grassland, subtropical or tropical seasonally wet or flooded lowland grassland, intermittent freshwater lakes, freshwater marshes, intermittent freshwater marshes, pastureland, rural gardens, urban areas, and heavily degraded former forest.

Scinax garbei is a species of frog in the family Hylidae. It is found in Bolivia, Brazil, Colombia, Ecuador, Peru, Venezuela, and possibly Guyana. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical swamps, rivers, intermittent freshwater marshes, plantations, rural gardens, heavily degraded former forest, and ponds.

Scinax granulatus is a species of frog in the family Hylidae. It is found in Argentina, Brazil, Paraguay, and Uruguay. Its natural habitats are temperate shrubland, subtropical or tropical moist shrubland, temperate grassland, subtropical or tropical seasonally wet or flooded lowland grassland, freshwater lakes, freshwater marshes, intermittent freshwater marshes, pastureland, plantations, rural gardens, urban areas, water storage areas, ponds, and canals and ditches.

Scinax hayii is a species of frog in the family Hylidae. It is endemic to Brazil. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, rivers, freshwater marshes, intermittent freshwater marshes, pastureland, urban areas, heavily degraded former forest, and ponds.

Scinax nasicus is a species of frog in the family Hylidae. It is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay. Its natural habitats are subtropical or tropical dry forests, moist savanna, temperate shrubland, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, subtropical or tropical high-altitude shrubland, temperate grassland, subtropical or tropical seasonally wet or flooded lowland grassland, freshwater lakes, intermittent freshwater lakes, freshwater marshes, arable land, pastureland, plantations, rural gardens, heavily degraded former forest, water storage areas, ponds, and canals and ditches.

Scinax nebulosus is a species of frog in the family Hylidae. It is found in Bolivia, Brazil, French Guiana, Guyana, Suriname, and Venezuela. Its natural habitats are subtropical or tropical moist lowland forests, moist savanna, intermittent freshwater marshes, pastureland, rural gardens, and heavily degraded former forest. It is threatened by habitat loss.

Scinax onca is a species of frog in the family Hylidae. It is endemic to Brazil and known from the middle and southern parts of the Purus–Madeira interfluvial region in the Amazonas and Rondônia states. The specific name onca is derived from the local common name for jaguar and refers to the blotchy color pattern of this frog; jaguars were also frequently spotted in the Purus–Madeira interfluvial region during the field work.

Scinax perereca is a species of frog in the family Hylidae. It is found in Argentina, Brazil, and Paraguay. Its natural habitats are subtropical or tropical moist lowland forests, freshwater marshes, intermittent freshwater marshes, heavily degraded former forest, ponds, and canals and ditches. It is threatened by habitat loss.

Scinax proboscideus is a species of frog in the family Hylidae. It is found in French Guiana, Guyana, Suriname, and possibly Brazil. Its natural habitats are subtropical or tropical moist lowland forests and intermittent freshwater marshes.

Scinax quinquefasciatus is a species of frog in the family Hylidae. It is found in Colombia and Ecuador. Its natural habitats are subtropical or tropical dry forests, subtropical or tropical moist lowland forests, subtropical or tropical moist shrubland, intermittent freshwater marshes, plantations, rural gardens, urban areas, heavily degraded former forest, ponds, and canals and ditches.

Scinax rostratus is a species of frog in the family Hylidae. It is found in central Panama and eastward to Colombia, Venezuela, and coastal lowlands of Guyana, Suriname, and French Guiana. Common name Caracas snouted treefrog has been coined for this species.

Scinax ruber is a species of frog in the family Hylidae. It is known in English as the red snouted treefrog or red-snouted treefrog, sometimes also Allen's snouted treefrog, the latter referring to the now-synonymized Scinax alleni. This widespread species is found in much of Amazonian and northern coastal South America and into Panama, as well as in some Caribbean islands as introduced populations. It is a complex containing several cryptic species.

Scinax similis is a species of frog in the family Hylidae. It is endemic to Brazil. Its natural habitats are moist savanna, subtropical or tropical dry lowland grassland, swamps, intermittent freshwater marshes, pastureland, rural gardens, urban areas, heavily degraded former forest, and ponds.

Scinax squalirostris is a species of frog in the family Hylidae. It is found in southeastern, southern and central Brazil, Uruguay, northeastern Argentina, southern Paraguay, and Bolivia. The nominal species might actually represent more than one species. Common names striped snouted treefrog and long-snouted treefrog have been coined for it.

Scinax staufferi is a species of frog in the family Hylidae. It is found in Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, and Nicaragua. Its natural habitats are subtropical or tropical dry forests, subtropical or tropical moist montane forests, moist savanna, subtropical or tropical seasonally wet or flooded lowland grassland, freshwater marshes, intermittent freshwater marshes, pastureland, rural gardens, heavily degraded former forest, ponds, and canals and ditches.

Scinax x-signatus is a species of frog in the family Hylidae. It is found in Brazil, the Guyanas, Venezuela and Colombia. Introduced populations exist on Guadeloupe and two nearby smaller islands, Marie Galante and La Désirade, and on Martinique. It may represent more than one species.