Axolotls are critically endangered salamanders living in the lakes and canals around Xochimilco in Mexico. Unlike most salamanders, they are neotenic, which means they spend their entire lives in larval form.
Axolotls have a distinctive silhouette, broad heads, lidless eyes, finned tails, and external gills. Wild axolotls sport dark tones, while leucistic varieties have a pale or golden coloration.
The California Tiger Salamander is endemic to California's grasslands and vernal pools. It is one of the largest species in its family, growing to 7-8 inches.
Since they are mole salamanders, they spend most of their lives in burrows and migrate to temporary pools during the rainy season to lay their eggs. The larvae remain underwater for a few months until they transform into land-dwelling adults.
Their diet consists of small invertebrates, and they have a unique defense mechanism when threatened. They also regulate the insect population in their ecosystem.
The Pacific Giant Salamander, a large species endemic to the Pacific Northwest in North America, can grow up to 13.4 inches. It typically has dark brown to black backs, adorned by light brown spots or marbling, and lighter underbellies.
This salamander prefers semi-aquatic habitats, favoring small-to-mid-sized streams and riverside forests.
Pacific Giant Salamanders get vocal if disturbed, emitting a distinct "bark." Adopting a defensive pose, it arches its body, thrashes its tail, and when the need arises, repels predators by secreting a noxious substance. Adults can also head-butt and bite.
The Red-backed Salamander mostly lives on land, mainly on the forest floors of eastern North America. It has a bright red or orange stripe on its body that helps it blend in with the leaf litter. Another morph called Lead Salamanders shows no red pigmentations. Both have speckled undersides.
Interestingly, it is a part of the Plethodontidae family, which comprises lungless salamanders. Their respiration method is breathing through their skin and mouth.
These terrestrial salamanders primarily feed on insects such as centipedes, spiders, and snails.
The Northern Slimy Salamander is also known as the Viscid Salamander, Grey-spotted Salamander, or Sticky Salamander. It lives in the leaf-strewn forests in the Northeastern United States. It has a long, slim body with dark hues and silver or white specks on its skin.
This lungless salamander primarily feeds on ants and beetles. Since it is a terrestrial species, it skips the aquatic larval stage of development. It prefers to live alone and only interacts during the mating season.
Northern slimy salamanders secrete adhesive-bound substances, impeding attackers' movement and biting capacity. They also respond to threats with body flips, tail lashes, and vocalizations.
The Southern Slimy Salamander lives in the southeastern United States, from southern South Carolina to central Florida. The salamander is named after Arnold B. Grobmani, a zoologist who studied these creatures.
It is black or brown, covered with white or silver spots, and feeds primarily on small invertebrates. Similar to its northern cousins, its unique defense mechanism involves secreting a sticky substance when threatened.
The Eastern Newt, living in eastern North America, inhabits small lakes, ponds, streams, and adjoining wet forests. It is also called the Red-spotted Newt.
It has a unique three-stage life cycle; it begins as aquatic larvae, transforms into land-dwelling juveniles known as 'efts,' and eventually returns to the water as mature adults. During the eft stage, their skin turns bright orange-red, which warns predators about the toxic chemicals in their skin.
The eastern newt secretes tetrodotoxin, providing a chemical defense against predatory fishes and invertebrates. However, bullfrogs are unaffected by the toxin and readily consume the creature. Therefore, newts still sustain high predation levels2 in fish-containing habitats due to bullfrogs.
The Red Salamander lives in the slow-moving waters, tranquil springs, swamps, and damp woodland terrains of the eastern United States.
These lungless salamanders, varying in color from bright red to orange-brown, darken and lose their distinct patterns with age. Unlike mud salamanders, they have more and larger dorsal spots, a gold-tinted iris with a horizontal bar, and a more pointed snout.
Fire Salamanders have black skin and bright yellow or orange markings, which deter predators. They live in the forests of Central and Southern Europe, where they spend their days hiding in logs, rocks, or burrows.
Its main toxin, samandarin, triggers severe muscle convulsions, hypertension, and hyperventilation in vertebrates. Further analysis of its skin secretions revealed another alkaloid called samandarone5.
The Alpine Salamander lives in the European Alps and is distinguishable by its jet-black body. It has adapted to the region's rugged peaks and lush forests, with altitudes ranging from 2,300 to 6,600 feet.
Interestingly, Alpine salamanders follow the viviparous reproductive method6, which allows them to give birth to live young. This is a trait uncommon in other amphibians.
