Free adults webcams costa rica
Melanistic jaguars (or “black” jaguars) occur primarily in parts of South America, and are virtually unknown in wild populations residing in the subtropical and temperate regions of North America; they have never been documented north of Mexico’s Isthmus of Tehuantepec.
Melanistic jaguars are informally known as black panthers, but (as with all forms of polymorphism) they do not form a separate species.
Results of DNA analysis shows the lion, tiger, leopard, jaguar, snow leopard, and clouded leopard share a common ancestor, and that this group is between six and ten million years old; the fossil record points to the emergence of Panthera just two to 3.8 million years ago.
The jaguar is thought to have diverged from a common ancestor of the Panthera species at least 1.5 million years ago and to have entered the American continent in the Early Pleistocene via Beringia, the land bridge that once spanned the Bering Strait.
This spotted cat closely resembles the leopard, but is usually larger and sturdier.
A 100 kg (220 lb) jaguar can bite with a force of 503.6 kgf (1110 lbf) at canine teeth and 705.8 kgf (1556 lbf) at carnassial notch.Results of jaguar mitochondrial DNA analysis indicates that the species' lineage evolved between 280,000 and 510,000 years ago.The position of the remaining species varies between studies and is effectively unresolved.The spots vary over individual coats and between individual jaguars: rosettes may include one or several dots, and the shapes of the dots vary.The spots on the head and neck are generally solid, as are those on the tail, where they may merge to form a band.