why are pythons an invasive species in the everglades
Burmese pythons in Florida The Burmese pythons in Florida are classified as an invasive species in the area. Invasive species disrupt the introduced ecosystem by preying on native species, outcompeting native species for food or other resources, and/or disrupting the physical nature of the environment.[7] Several life history traits of Burmese pythons characterize them as a particularly successful invasive species. Because of their large size, and as a nonnative species, adult Burmese pythons have few predators within Florida, apart from alligators and humans. Although hatchlings have an increased likelihood of being preyed upon, they are comparable in size or even larger than adult native snake species and quickly reach sizes that reduce their vulnerability to predation.[8]
Fauna of Australia The fauna of Australia consists of a huge variety of animals; some 83% of mammals, 89% of reptiles, 24% of fish and insects and 93% of amphibians that inhabit the continent are endemic to Australia.[2] This high level of endemism can be attributed to the continent's long geographic isolation, tectonic stability, and the effects of an unusual pattern of climate change on the soil and flora over geological time. A unique feature of Australia's fauna is the relative scarcity of native placental mammals. Consequently, the marsupials — a group of mammals that raise their young in a pouch, including the macropods, possums and dasyuromorphs — occupy many of the ecological niches placental animals occupy elsewhere in the world. Australia is home to two of the five known extant species of monotremes and has numerous venomous species, which include the platypus, spiders, scorpions, octopus, jellyfish, molluscs, stonefish, and stingrays. Uniquely, Australia has more venomous than non-venomous species of snakes.