Widely Distributed:
* Humans (Homo sapiens): We're the most widespread mammal, inhabiting every continent and many islands.
* Domesticated animals: These include animals like dogs, cats, pigs, cows, chickens, etc., often found in many regions due to human influence.
* Insects: Many insect species are found across vast areas, thanks to their ability to fly and adapt to different environments. Examples include houseflies, mosquitoes, ants, and cockroaches.
* Birds: Some bird species have enormous ranges. Migratory birds travel vast distances, while others are found in diverse habitats across continents. Examples include seabirds, geese, ducks, and eagles.
* Fish: Many fish species are found in both freshwater and saltwater systems across the globe.
Large Ranges:
* Rats and Mice (Rodentia): These rodents are highly adaptable and found in diverse habitats worldwide.
* Bats (Chiroptera): Many bat species have global or near-global distributions, utilizing various niches.
* Snakes (Serpentes): Some snake species are found across continents, adapting to various climates and environments.
* Sea Turtles: These marine reptiles have extensive ranges, often migrating thousands of miles across oceans.
* Whales (Cetacea): Many whale species undertake long migrations, spanning the globe.
Important Considerations:
* Introduced species: Humans have introduced many animals beyond their natural ranges, which can have ecological consequences.
* Climate change: Global warming is affecting animal distributions, causing some species to expand their ranges and others to shrink.
* Habitat fragmentation: Human activity is reducing the range of many species through habitat loss and fragmentation.
So, while there are no animals found *absolutely everywhere*, some have vast distributions, and many others have ranges encompassing significant portions of the globe.