Thursday, March 17, 2011

River Dolphin

True Wild Life | River Dolphin | There are only four species of river dolphin still existing in river, lakes and estuaries in certain parts of the tropical Southern Hemisphere. River dolphins are also known as freshwater dolphins with one species however inhabiting saltwater estuaries known as the La Plata dolphin. The Amazon river dolphin (Boto or Pink river dolphin) is found in the Amazon river and the joining rivers, with the Amazon river dolphin being the largest species of freshwater dolphin. The Amazon river dolphin feeds on crabs, fish and catfish and is rarely hunted by animals other than humans.

The Ganges river dolphin (Indus River Dolphin) is found in Bangladesh, India, Nepal and Pakistan. The Ganges river dolphin is primarily found in the Ganges and Brahmaputra Rivers and their joining rivers in India, Bangladesh and Nepal. The Ganges river dolphin has long teeth that can be seen even when the dolphins mouth is closed. The Chinese river dolphin (Baiji) was once found only in the Yangtze River in China but sadly said to have become extinct in 2006.

Some river dolphins are thought to be blind, but other river dolphins still possess incredibly poor eye sight and many are therefore killed when accidentally coming into content with fishing boats and nets. Like other species of dolphin, the river dolphins hunt and communicate using echolocation, a process which involves the detection of low frequency waves that are emitted by all the living things. River dolphins are mainly found in darker, slow-moving waters but are known to venture into grasslands and underwater forests during the flood seasons. It is now, when the water is at the highest level that the baby river dolphins are born underwater.

River dolphins have a long, narrow beak and flexible neck which helps them to catch prey quickly and enables the river dolphins to turn quickly and more easily in the water. River dolphins are normally found on their own or in pairs but large groups of river dolphins will often come together to feed.

No comments:


Albatross Alligator Amphibian Angelfish Ant Anteater Antelope Ape Armadillo Aves Avocet Axolotl Baboon Badger Bandicoot Barb Barracuda Bat Bear Beaver Bee Beetle Binturong Bird Birds Of Paradise Bison Boar Bongo Bonobo Booby Budgerigar Buffalo Butterfly Butterfly Fish Caiman Camel Capybara Caracal Carnivore Cassowary Cat Caterpillar Catfish Cattle Centipede Chameleon Chamois Cheetah Chicken Chimpanzee Chinchilla Cichlid Civet Clouded Leopard Clown Fish Coati Cockroach Collared Peccary Common Buzzard Coral Cougar Cow Coyote Crab Crane Critically Endangered Crocodile Crustacean Cuscus Damselfly Deer Dhole Discus Dodo Dog Dolphin Donkey Dormouse Dragon Dragonfly Duck Dugong Eagle Echidna Eel Elephant Emu Endangered Extinct Falcon Ferret Fish Flamingo Flatfish Flounder Fly Fossa Fox Frog Gar Gazelle Gecko Gerbil Gharial Gibbon Giraffe Goat Goose Gopher Gorilla Grasshopper Grouse Guinea Fowl Guinea Pig Guppy Hamster Hare Hedgehog Herbivore Heron Hippopotamus Horse Human Hummingbird Hyena Ibis Iguana Impala Insect Invertebrate Jackal Jaguar Jellyfish Kangaroo Kingfisher Kiwi Koala Kudu Ladybird Ladybug Larvae Least Concern Lemming Lemur Leopard Lion Lionfish Lizard Llama Lobster Lynx Macaque Mammal Mammoth Manatee Mandrill Manta Ray Marsupial Mayfly Meerkat Millipede Mole Mollusca Molly Mongoose Monkey Moorhen Moose Moth Mouse Mule Near Threatened Newt Nightingale Numbat Octopus Okapi Olm Omnivore Opossum Orang Utan Oriole Ostrich Otter Owl Oyster Pademelon Panda Panther Parrot Peacock Pelican Penguin Phanter Pheasant Pig Pika Pike Piranha Platypus Pond Skater Possum Prawn Primate Puffer Fish Puffin Puma Quail Quoll Rabbit Raccoon Raccoon Dog Rare Rat Reindeer Reptile Rhinoceros Robin Rodent Salamander Scorpion Scorpion Fish Sea Dragon Sea Lion Sea Slug Sea Squirt Sea Urchin Seahorse Seal Serval Shark Sheep Shrew Shrimp Skunk Sloth Snail Snake Spider Sponge Squid Squirrel Starfish Stoat Swan Tamarin Tapir Tarantula Threatened Tiger Toad Tortoise Toucan Turkey Turtle Vulnerable Vulture Walrus Weasel Whale Wildebeest Wolf Woodlouse Woodpecker Worm Zebra