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Pseudis paradoxa, known as the paradoxical frog or shrinking frog, is a species of hylid frog from South America. [2] Its name refers to the very large—up to 27 cm (11 in) long—tadpole (the world's longest), which in turn "shrinks" during metamorphosis into an ordinary-sized frog, only about a quarter or third of its former length.
Eggs can hatch in under 30 hours and tadpoles can fully develop in one month. [13] They have wide caudal fins and two rows of labial teeth on the top of their mouths and four rows on the bottom. [14] Tadpoles survive on algae and will occasionally eat other tadpoles, [13] and on rare occasions, recently metamorphosed juveniles. [15]
The Pine Barrens tree frog [3] (Dryophytes andersonii) ... The eggs are laid in May and June; the tadpoles metamorphose into adults in July and August. Eggs are laid ...
The tadpoles are fully developed and ready to undergo metamorphosis at about two months old. [1] [7] There is evidence that suggests they can produce a second clutch in the same reproductive season allowing for two sets of eggs. [10] Pine woods treefrog tadpoles may exhibit predator-induced phenotypic plasticity.
Pseudis is a genus of South American frogs (swimming frogs) in the family Hylidae. [1] They are often common and frequently heard, but easily overlooked because of their camouflage and lifestyle, living in lakes, ponds, marshes and similar waters with extensive aquatic vegetation, often sitting at the surface among plants or on floating plants, but rapidly diving if disturbed.
Cope's gray treefrog [2] (Dryophytes chrysoscelis) is a species of treefrog found in the United States and Canada. It is almost indistinguishable from the gray treefrog (Dryophytes versicolor), and shares much of its geographic range. Both species are variable in color, mottled gray to gray-green, resembling the bark of trees.
The species is especially vulnerable to predation when living in temporary ponds compared to permanent waters. To combat predation, green tree frog tadpoles may increase hiding behavior while in water to avoid capture. [7] [27] The American green tree frog is also prone to a few parasites, including nematodes, protozoans, and trematodes. [28]
Tadpoles of H. rosenbergi undergo metamorphosis at a size of 21mm SVL, approximately 40 days after fertilization, resulting in extremely large fat bodies and visibly undifferentiated gonads. [6] These froglets are covered with many small dark spots and have much less webbing in the fingers and toes as compared to adult frogs. [ 6 ]