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These frogs are small in size and do not weigh more than a few grams. They vary in color, mostly ranging from olive green to brown with black spots. The average life expectancy of these frogs is five years, but they have been known to live longer than 20 years, [4] and they can grow to 1" to 1.5" long.
Pickerel frog egg masses are spherical and about the same size of a wood frog egg mass—roughly 5–10 cm in diameter—although pickerel frog egg masses contain more eggs, about 2000–3000. [4] Pickerel frog eggs are multicolored: they are dark brown on top and cream colored on the bottom.
Brachycephalus pulex, also known as the Brazilian flea toad and the Serra Bonita flea toad, is a species of small frogs in the family Brachycephalidae. It is one of more than 40 named species within the genus Brachycephalus. B. pulex is the smallest known vertebrate, with an average length of 7.10 millimetres (0.280 in) in mature males.
The Hyperoliidae, or sedge frogs and bush frogs, are a large family of small to medium-sized, brightly colored frogs which contain more than 250 species in 19 genera. Seventeen genera are native to sub-Saharan Africa. [ 1 ]
Eleutherodactylus spp. are small tree frogs that can vary in color. These frogs can be a mixture of brown, yellow, green, and gray on the top and either white or yellow on the bottom side of their body. The eye color is a variation of brown and gold. They can range in size from 15–80 millimetres (0.59–3.15 in). [3]
"Fewer than a dozen of the 6455 species of frogs in the world are known to have internal fertilization, and of these, all but the new species either deposit fertilized eggs or give birth to froglets."
Frog populations have declined significantly since the 1950s. More than one third of species are considered to be threatened with extinction and over 120 are believed to have become extinct since the 1980s. The number of malformations among frogs is on the rise and an emerging fungal disease, chytridiomycosis, has spread around the world.
Wood frogs range from 51 to 70 mm (2.0 to 2.8 in) in length. Females are larger than males. [5] [6] Adult wood frogs are usually brown, tan, or rust-colored, and usually have a dark eye mask. [7] Individual frogs are capable of varying their color; Conant (1958) depicts one individual which was light brown and dark brown at different times.