The name frog derives from Old English frogga, abbreviated to frox, forsc, and frosc, probably deriving from Proto-Indo-European preu = "to jump". source
The name frog derives from Old English frogga, abbreviated to frox, forsc, and frosc, probably deriving from Proto-Indo-European preu = "to jump".
The eyes of most frogs are located on either side of the head near the top and project outwards as hemispherical bulges. source
The eyes of most frogs are located on either side of the head near the top and project outwards as hemispherical bulges.
The eyes of frogs provide binocular vision over a field of 100° to the front and a total visual field of almost 360°. source
The eyes of frogs provide binocular vision over a field of 100° to the front and a total visual field of almost 360°.
Frogs that live in or visit water have adaptations that improve their swimming abilities. source
Frogs that live in or visit water have adaptations that improve their swimming abilities.
Frogs typically lay their eggs in water. source
Frogs typically lay their eggs in water.
Frogs are extremely efficient at converting what they eat into body mass. source
Frogs are extremely efficient at converting what they eat into body mass.
Frogs have highly specialized rasping mouth parts suitable for herbivorous, omnivorous or planktivorous diets. source
Frogs have highly specialized rasping mouth parts suitable for herbivorous, omnivorous or planktivorous diets.
Frogs are an important food source for predators and part of the food web dynamics of many of the world's ecosystems. source
Frogs are an important food source for predators and part of the food web dynamics of many of the world's ecosystems.
The oldest fossil "proto-frog" appeared in the early Triassic of Madagascar, source
The oldest fossil "proto-frog" appeared in the early Triassic of Madagascar,
. Adult frogs generally have a carnivorous diet consisting of small invertebrates, but omnivorous species exist and a few feed on fruit. source
. Adult frogs generally have a carnivorous diet consisting of small invertebrates, but omnivorous species exist and a few feed on fruit.
. The skin of the frog is glandular, with secretions ranging from distasteful to toxic. source
. The skin of the frog is glandular, with secretions ranging from distasteful to toxic.
Frogs are widely distributed, ranging from the tropics to subarctic regions, source
Frogs are widely distributed, ranging from the tropics to subarctic regions,
Frogs are one of the five most diverse vertebrate orders. source
Frogs are one of the five most diverse vertebrate orders.
Frog populations have declined significantly since the 1950s. More than one third of species are considered to be threatened with extinction . source
Frog populations have declined significantly since the 1950s. More than one third of species are considered to be threatened with extinction .
The number of malformations among frogs is on the rise and an emerging fungal disease, chytridiomycosis. source
The number of malformations among frogs is on the rise and an emerging fungal disease, chytridiomycosis.