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A tadpole or polliwog (also spelled pollywog) is the larval stage in the biological life cycle of an amphibian. Most tadpoles are fully aquatic, though some species of amphibians have tadpoles that are terrestrial. Tadpoles have some fish-like features that may not be found in adult amphibians such as a lateral line, gills and swimming tails.
If they do resort to cannibalism, their bodies can transform. They "develop larger heads, sharp beaks, stronger jaw muscles, and shortened intestine". [9] Researchers have concluded that this is an adaptive trait because it accelerates the rate of growth of the tadpoles by allowing for an increased caloric intake. [9]
nymph in Cyprus Walking on water surface; the dark blobs are shadows cast by water disturbances around each of the six legs touching the water.. The Gerridae are a family of insects in the order Hemiptera, commonly known as water striders, water skeeters, water scooters, water bugs, pond skaters, water skippers, water gliders, water skimmers or puddle flies.
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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]
A magical underwater image of western toad tadpoles has won the 2024 Wildlife Photographer of the Year competition.
As tadpoles, the squirrel tree frog is preyed upon by dragonfly nymphs, giant water bugs, predatory fish and newts. [2] [3] Once the tadpoles metamorphose, the predators of the frogs change to small mammals, other frogs, snakes, birds. [2] To reduce the danger of being eaten as tadpoles, they use dense vegetation as cover. [4]
Small pickerel tadpoles are yellowish to yellowish brown in color; as they grow their color changes to an olive green, which eventually changes to gray brown on top and cream colored underneath. Larger tadpole are often mistaken as green frogs. There are a few characteristics to aid in distinguishing between pickerel and green tadpoles.