A frog has bulging eyes.
A frog has three eyelid membranes. One is transparent (see through) to protect the eyes when the frog is underwater. The other two eyelid membranes vary from translucent (clear) to opaque (cloudy).
Its eyes are at the top of its head, and may be the only part of a submerged frog that is seen above the water.
A frog’s iris can have a range of colours and its pupil can be a variety of shapes.
Continue reading “Frog Eyes”
The Perez’s Frog (Pelophylax perezi) is a freshwater wetlands amphibian in the Ranidae family of water frogs. It is also known as the Iberian Waterfrog, the Iberian Green Frog, or the Coruna Frog.
The Perez’s Frog is green, olive or brown. On its back is a green line that runs from head to tail. There are small warts on its back. Its underbelly is creamy-white. It has a slender body with long hind (back) legs, and no tail. It has protruding eyes with vertical pupils. It has webbed feet.
Continue reading “Perez’s Frog”
The Common Parsley Frog (Pelodytes punctatus) is a wetlands amphibian.
The Caucasian Parsley Frog is green, olive or brown. On its back are irregular green patches that look like parsley leaves. There are also warts on its back. Its underbelly is creamy-white. It has a slender body with long hind (back) legs, and no tail. It has protruding eyes with vertical pupils. It has webbed feet.
Continue reading “Common Parsley Frog”
The Phantasmal Poison Frog (Epipedobates tricolor) is an endangered amphibian. It is a Poison Dart Frog.
The Phantasmal Poison Frog has smooth, dark-red to red-brown skin with three yellow-white side stripes from its head to its tail. It has white spots on its hind (back) legs. It has large dark eyes. It has webbed feet with one digit (toe) longer than the others.
Continue reading “CREATURE FEATURE: Phantasmal Poison Frog”
The Argentine Horned Frog (Ceratophys ornata) is a non-venomous amphibian. It is also known as the Pacman Frog, the South American Horned Frog, or the Argentine Wide-Mouthed Frog.
The Argentine Horned Frog has a thick, round, bright green body with dark or red markings that look like an artist’s palette of paint. It camouflages itself well in its environment. It has a wide mouth, which is why it is named after the video character Pac-Man.
Continue reading “CREATURE FEATURE: Argentine Horned Frog”
The Mexican Axolotl (Ambystoma mexicanum) is a freshwater amphibian in the salamander family. It is also known as the Mexican Walking Fish, but it is not a fish. Toads, frogs, newts, salamanders and axolotl are amphibians, living partly in water and partly on land. However, the axolotl never leaves the water.
The Mexican Axolotl remains in the amphibian tadpole form, with gills, and never becomes an ‘adult’ with lungs. This is called partial metamorphosis. It has a wide head, and their eyes do not have eye-lids. It has four feathery external gills on the side of its head. It has little, under-developed legs. It is olive-green, with a lighter underbelly. It does not have scales – it has moist, smooth skin like the skin of frogs.
Continue reading “Mexican Axolotl”
The Amazon Milk Frog (Trachycephalus resinifictrix) is an arboreal amphibian. It is also called the Mission Golden-Eyed Tree Frog or the Blue Milk Frog.
The Amazon Milk Frog is light-grey with brown or black bands. As it ages, it develops bumpy skin. It looks like milk has been spilled on it, but the name actually refers to the milky fluid that it excretes when it is stressed.
Continue reading “Amazon Milk Frog”
The Schneider’s Toad (Rhinella schneideri) is a common and widespread amphibian. It is also called the Cururu Toad or the Rococo Toad.
The Schneider’s Toad has a short, broad brownish-yellow body with a crested head. It has a whitish belly and throat. It has a rounded snout (nose). It has a distinctive visible tympanum (eardrum). Its eyes are large and bulging with line-shaped pupils. It does not have webbing between its toes. Its skin is rough and covered with blunt, spiny warts. The warts are light near the bottom and spotted with black on the top.
Continue reading “Schneider’s Toad”
The Lake Oku Clawed Frog (Xenopus longipes) is a critically endangered freshwater amphibian.
The Lake Oku Clawed Frog is dark-coloured with claws at the ends of its two hind (back) feet. Its back is brown, and its belly is speckled black on an orange background.
Continue reading “Lake Oku Clawed Frog”
The Lake Patzcuaro Salamander (Ambystoma dumerilii) is an endangered freshwater amphibian. Frogs, toads, newts, salamanders, and axoltols are amphibians. It is also called the Lake Patzcuaro Achoque. It is related to the Mexican Axolotl.
The Lake Patzcuaro Salamander remains in its tadpole form for its whole life. It has feathery external gills, which it uses to breath. It is yellowish with a lighter shade on its underbelly. It has a large head, a tail, and short legs. It has four toes on its front legs and five toes on its back legs. It does not have scales – it has moist, smooth skin like the skin of frogs.
Continue reading “Lake Patzcuaro Salamander”
The Blue Poison Dart Frog (Dendrobates tinctorius azureus) is a medium-sized poisonous amphibian.
The Blue Poison Dart Frog has bright blue skin, with a darker blue belly and darker blue limbs. It has black spots. It has a hunched back. Each foot has four toes, with suction cups to grip surfaces. Males have heart-shaped tips on each toe, whereas females have rounded tips.
Continue reading “CREATURE FEATURE: Blue Poison Dart Frog”
The Vietnamese Mossy Frog (Theloderma corticale) is an amphibian.
The Vietnamese Mossy Frog has mottled brown and green skin that looks like moss growing on a rock. It has large sticky pads on its toes. It has a pale belly.
Continue reading “Vietnamese Mossy Frog”
Male frogs croak to attract a female. Females respond with a different and quieter vocalization.
The croaking sound occurs when a frog forces air out of its lungs through its mouth. As the air passes its throat, its larynx (vocal chords) vibrate.
The vocal sacs or pouches distend and blow up like a balloon. The vocal sacs are elastic membranes of skin. Some frogs have the vocal sac under their throat, whereas other frogs have the vocal sac on the corner of their mouth.
Continue reading “How do frogs croak?”
The Magnificent Tree Frog (Litoria splendida) is an arboreal amphibian found only in northwestern Australia.
The Magnificent Tree Frog is olive, emerald, or bright green with yellow or white blotches. It has a cream underbelly, and the undersides of its feet and legs are bright yellow.
Continue reading “Magnificent Tree Frog”
External covering is the outside appearance of an animal. Animals can have fur, feathers, hair, short hair, long hair, smooth hair, bristles, skin, thick skin, moist skin, dry skin, scales, waterproof scales, small scales, overlapping scales, spikes, hard shells, soft shells, smooth shells, rough shells, wool, or no covering at all.
Continue reading “External Covering: from skin and scales to fur and feathers”
What is an amphibian?
Amphibians (such as frogs, toads, newts, axolotl, and salamanders) live part of their lives in water and part of their lives on land.
Continue reading “Amphibian”
A newly discovered glass frog species whose beating heart is visible through its chest is already under threat of extinction, because its habitat is threatened by oil exploitation.
The frog (Hyalinobatrachium yaku) lives in the Amazonian lowlands of Ecuador.
“Not all glass frogs have hearts that are visible through the chest. In some, the heart itself is white, so you don’t see the red blood,” said Paul Hamilton, of the American non-profit organisation called the Biodiversity Group. Glass frogs need pristine (pure) streams to breed. “If the stream dries up, or becomes polluted, the frogs can’t survive,” said Hamilton.
Continue reading “Amazonian see-through glass frog is under threat of extinction”
Iridescence means shiny with many colours. Many animals have iridescent colours.
Iridescence is structural colour from refracted light (crystals), diffraction gratings (feathers or butterfly wings), thin film (oily surfaces), multiple layer interference (nacre in shells), or 3-D arrays of spheres (opals).
The word iridescence comes from iris, the Greek word for rainbow. An iridescent object has many tones of colour. Iridescence creates colour by splitting and reflecting light from different structures – which is why it is often called structural colour.
Continue reading “Iridescent scales, feathers and shells”