LEPTODEIRA SEPTENTRIONALIS PDF

Appearance[ edit ] Head of a northern cat-eyed showing a dark brown line beside a bulging eye taken at Golfo Dulce Retreat , Golfo Dulce , Costa Rica The northern cat eye is medium size up to 1 m. They have smooth scales, with dark brown line or spot beside the eye and dark brown blotches which can fuse to form a zigzag running down their backs, these spots may vary in pattern geographically. Its head is distinctly wider than its neck and it has large bulging eyes with reddish irises and light brown elliptical pupils. At night it hunts for frogs and their eggs, it is particularly known for feeding on those of the red-eyed tree frog. When threatened it is able to flatten its head and spread its jaws although it rarely bites people.

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Campbell recognized Leptodeira populations from southern Mexico to Costa Rica as a separate species, L. Habitat 6 Leptodeira annulata can be found in a multitude of environments ranging from semi-arid scrub to rain forests. In Mexico, these snakes have been documented at elevations of up to 1, m. Range elevation: 1, high m. Habitat Regions: temperate ; tropical ; terrestrial Terrestrial Biomes: desert or dune ; rainforest ; scrub forest Aquatic Biomes: lakes and ponds; rivers and streams; temporary pools Morphology 7 Leptodeira annulata is characterized by a head that is much wider than its neck and large eyes with vertical pupils that give the common name, cat-eyed snakes.

Above, these snakes are tan, buff, pale gold, or pale orange yellow with a distinctive pattern of large to medium-sized, brown, dorsal blotches or "saddles". Body coloration and size of dorsal spots may vary geographically. The crown is dark with a "spearhead" pointed towards the rear. They feature a thin, dark line on the posterior of each eye. The ventral surface is pale orange anteriorly but becomes brighter closer to the tail.

Each ventral scale has a dark border. Adults weigh an average There is little sexual dimorphism in this species, but females average slightly longer than males. Young cat-eyed snakes resemble adults, but have much stronger coloration. Hatchlings measure Leptodeira annulata belongs to a special class of snake known as Opisthoglyphous, or rear fanged snakes.

The fangs of these snakes are located at the back of the jaw, so the snake has to position its prey in its jaw in order to bite it. The venom of cat-eyed snakes is of relatively low toxicity and is only enough to subdue small prey. There are several species that may be confused with northern cat-eyed snakes. The brown-banded morphs of ground snakes have thinner heads, a less contrasting pattern, and round pupils. Differences in coloration distinguish southwestern rat snakes which have dark blotches covering the first half of their bodies, and Texas night snakes which have small dorsal spots bordered by a lateral row of smaller spots.

Average mass: Range length: Average length: Other Physical Features: heterothermic ; venomous Sexual Dimorphism: female larger Trophic strategy 8 The primary diets of northern cat-eyed snakes consist of frogs however, it will also consume lizards, toads, salamanders, tadpoles, small fish and mice. If the prey is small enough, the snake will swallow it whole while it is still alive. If it is a larger animal, the snake will position it to the back its jaw and will use its rear fangs to puncture the prey many times so the low-toxicity venom will seep into the wounds and eventually paralyze the prey.

These snakes are often found hunting near ponds and rivers with abundant breeding amphibians. Snakes will drill their heads into the egg sack and eat the eggs one at a time. The diet of northern cat-eyed snakes changes with the seasons. During the dry season, these snakes will start feeding primarily on lizards which remain active throughout the arid conditions.

They may also hunt in small puddles where fish and frogs are trapped. Frog mating season often coincides with the rainy season, at which time snakes consume mostly amphibians and their eggs.

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Species was not fully specified, species name missing!

Bartlett, R. Bezy, R. Enderson, A. Rosen, D. The herpetofauna of Sonora, Mexico, with comparisons to adjoining states. Check List, 5: —

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Leptodeira

Campbell recognized Leptodeira populations from southern Mexico to Costa Rica as a separate species, L. Habitat 6 Leptodeira annulata can be found in a multitude of environments ranging from semi-arid scrub to rain forests. In Mexico, these snakes have been documented at elevations of up to 1, m. Range elevation: 1, high m. Habitat Regions: temperate ; tropical ; terrestrial Terrestrial Biomes: desert or dune ; rainforest ; scrub forest Aquatic Biomes: lakes and ponds; rivers and streams; temporary pools Morphology 7 Leptodeira annulata is characterized by a head that is much wider than its neck and large eyes with vertical pupils that give the common name, cat-eyed snakes. Above, these snakes are tan, buff, pale gold, or pale orange yellow with a distinctive pattern of large to medium-sized, brown, dorsal blotches or "saddles".

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