Birds are considered reptiles under the phylogenetic classification system. This method of categorizing organisms was developed in the 1940s and is based on common ancestry.
In phylogenetics, all animals, including birds, mammals and dinosaurs, that have genetic connections to early reptiles are reptiles. Birds are traced back to the group of feathered dinosaurs that did not die off during the massive dinosaur extinction 65 million years ago. Over time, these dinosaurs evolved into birds. However, in an 18th century classification scheme, the Linnaean system, organisms are grouped together based on common traits. Since reptiles are cold-blooded and have scales, birds do not fall into this category following the Linnaean system.Learn More
Among the animals whose names start with the letter "n" are the nutria, nyala, nanger, narwhal, needlefish, night sergeant, northern sennet, natal barred blue butterfly, night butterfly and Northern Jungle Queen. Other animals include the nuthatch, nightjar, northern mole cricket, nectar-sucking blister beetle and nine-spotted ladybird beetle.Full Answer >
A fox's bark is used to distinguish one fox from another, in the same way a human voice is used to tell two people apart. Foxes make a range of noises, including barks, screams, growls and howls. In the winter through spring seasons, during mating time, a fox will bark as a warning to other nearby male foxes to warn them from entering their territory.Full Answer >
There are about 78 types or species of whales, though this number ranges from 78 to 90 depending on the source. This group, called cetaceans, includes dolphins and porpoises, as well as whales.Full Answer >
The top 10 endangered animals in the world, as of December 2014, are the ivory-billed woodpecker, Amur leopard, Javan rhino, northern sportive lemur, western lowland gorilla, saola, leatherback sea turtle, tiger, Chinese giant salamander and the little dodo bird. Other critically endangered species include the mountain gorilla, northern right whale and the kakapo parrot.Full Answer >