Snake Silhouette PNG Transparent Images

Download best HD quality free Snake Silhouette PNG Transparent Images backgrounds which is available in various dimensions and pixels. To download the original resolution of silhouette PNG, click on the below thumbnail image.

License Info: Creative Commons 4.0 BY-NC


Uploaded on on Jul 16, 2021

Advertisements

Snakes are carnivorous reptiles with elongated bodies and no limbs that belong to the Serpentes suborder. Snakes are ectothermic, amniote animals with overlapping scales, like all other squamates. Snakes have more joints in their skulls than their lizard forefathers, allowing them to swallow food considerably larger than their heads with their extremely flexible jaws. Snakes’ paired organs (such as kidneys) appear one in front of the other rather than side by side to suit their small bodies, and most have only one functioning lung. A pelvic girdle with a pair of vestigial claws on either side of the cloaca is retained in some species.

Through convergent evolution, lizards have developed elongate bodies without limbs or with drastically reduced appendages around twenty-five times independently, resulting in numerous legless lizard lineages. Although this rule is not general, some common families of legless lizards have eyelids and external ears, which snakes do not have (see Amphisbaenia, Dibamidae, and Pygopodidae).

Except for Antarctica, living snakes can be found on every continent and on most smaller land masses; exceptions include some large islands, such as Ireland, Iceland, Greenland, the Hawaiian archipelago, and the New Zealand islands, as well as many small islands in the Atlantic and central Pacific oceans. Sea snakes may also be found across the Indian and Pacific seas. There are presently more than twenty recognized families, with around 520 genera and 3,900 species. They range in size from the small 10.4 cm (4.1 in) Barbados threadsnake to the 6.95 meter (22.8 ft) reticulated python.

Advertisements

Titanoboa cerrejonensis was a 12.8-meter-long (42-foot-long) fossil. Snakes are considered to have developed from burrowing or aquatic lizards during the Jurassic era, with the oldest known fossils dated from 143 to 167 Ma. The Paleocene period (ca. 66 to 56 Ma ago, after the Cretaceous–Paleogene extinction catastrophe) is when modern snakes first developed. The Brooklyn Papyrus contains the first known descriptions of snakes.

The majority of snake species are nonvenomous, and those that do have venom utilize it to kill and subjugate prey rather than to defend themselves. Some have venom that is capable of inflicting painful damage or death in humans. Snakes that aren’t poisonous either swallow their victims whole or kill them through constriction.

Snakes have a limited fossil record because their bones are generally tiny and brittle, making fossilization difficult. During the Cretaceous epoch, the first snake-like fossils (sometimes with hind limbs still attached) occur in the fossil record. The earliest known genuine snake fossils (members of the crown group Serpentes) originate from the marine simoliophiids, the oldest of which being the Late Cretaceous (Cenomanian age) Haasiophis terrasanctus, which dates from 112 to 94 million years ago.

Snakes are thought to have derived from lizards based on comparative anatomy.:11 Pythons and boas, two of the most basic species of extant snakes, contain vestigial hind limbs: small, clawed digits called anal spurs that are used to grip during mating. When visible, remains of the pelvic girdle can be seen in the families Leptotyphlopidae and Typhlopidae as horny projections.

Download Snake Silhouette PNG transparent background images

Related Silhouette PNG: