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Pyramid Mountain Natural Historic Area
Morris County, New Jersey
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I have white gloves on and I'm holding this Red-eyed Treefrog (or Leaf Frog), Agalychnis callidryas. Tortuguero National Park, Costa Rica.
Hylidae: Dendropsophus ebraccatus
found at La Selva Biological Station, Sarapiqui, Costa Rica
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The gray tree frog or gray treefrog (Hyla versicolor) is a species of small arboreal frog native to much of the eastern United States and southeastern Canada.[2]
It is sometimes referred to as the eastern gray tree frog, common gray tree frog, or tetraploid gray tree frog to distinguish it from its more southern, genetically disparate relative, the Cope's gray tree frog (Hyla chrysoscelis). It may sometimes be referred to as the North American tree frog by Europeans to distinguish it from their European tree frog (Hyla arborea).
As the scientific name implies, gray tree frogs are variable in color owing to their ability to camouflage themselves from gray to green, depending on the substrate where they are sitting. The degree of mottling varies. They can change from nearly black to nearly white. They change color at a slower rate than a chameleon. Dead gray tree frogs and ones in unnatural surroundings are predominantly gray. They are relatively small compared to other North American frog species, typically attaining no more than 1.5 to 2 in (3.8 to 5.1 cm). Their skin has a lumpy texture to it, giving them a warty appearance. They are virtually indistinguishable from the Cope's gray tree frog, H. chrysoscelis, the only readily noticeable difference being their calls. Cope's gray tree frog has a shorter, faster call.[3] The gray tree frog also has an extra set of chromosomes (4N), or 48 in total, and is called tetraploid gray tree frog in scientific circles. The more southerly Cope's gray tree frog, or diploid gray tree frog, retained its 2N (24) original chromosome set, so hybridization between these species would not be successful.
Both H. chrysoscelis and H. versicolor have bright-yellow patches on their hind legs, which distinguishes them from other tree frogs, such as H. avivoca.[4] The bright patches are normally only visible while the frog is jumping. Both species of gray tree frogs are slightly sexually dimorphic. Males have black or gray throats, while the throats of the females are lighter.[5]
Tadpoles have rounded bodies (as opposed to the more elongated bodies of stream species) with high, wide tails that can be colored red if predators are in the system. Metamorphosis can occur as quickly as two months with optimal conditions. At metamorphosis, the new froglets will almost always turn green for a day or two before changing to the more common gray. Young frogs will also sometimes maintain a light green color and turn gray or darker green after reaching adulthood.
Gender identification
Source: Wikipedia
Found this on our back porch, then it hopped into the grass...far away from the forest. Maybe the gully washers we had two nights ago had something to do with this cutie moving.
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This is one of the largest species of treefrogs; it inhabits the Costa and Amazonian regions.
Hypsiboas boans
This photograph is part of the book "Sapos"
Dark eared treefrog (Polypedates macrotis) - Danum Valley, Malaysia
In my time in Borneo I came across just over 30 species of frogs, and I was lucky enough to be able to get photos of most of them. This here is a Dark eared treefrog (Polypedates macrotis), my field guide says it is found in both primary and disturbed forests and ranges throughout Borneo and has also been reported from Sumatra and the South Phillipine Islands. I would see these frogs sporadically during my time in Borneo, definitely one of the more common species.