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ɪ f ɔːr m iː z / is an order of large flightless birds that has four surviving members: the three species of cassowary, and the only remaining species of emu. They are divided into either a single family, Casuariidae, or more typically two, with the emu splitting off into its own family, Dromaiidae.
The emu (/ ˈ iː m juː /; Dromaius novaehollandiae) is a species of flightless bird endemic to Australia, where it is the tallest native bird. It is the only extant member of the genus Dromaius and the third-tallest living bird after its African ratite relatives, the common ostrich and Somali ostrich. The emu's native ranges cover most of the ...
The data provided from these studies can, however, support and enrich the understanding of a species' ecomorphological adaptations. [3] For instance, the relationship between the organization of the jaw lever-arm system, mouth size, and jaw muscle force generation and the feeding behaviour of sunfish has been investigated. [10]
Unlike other ratites, it lives exclusively in tropical rainforest, and reproducing this habitat carefully is essential. Unlike the emu, which will live with other sympatric species, such as kangaroos, in "mixed Australian fauna" displays, the cassowary does not cohabit well among its own kind. Individual specimens must even be kept in separate ...
Skeletal mount (note damaged skull) Presently, most authorities consider the southern cassowary monotypic, but several subspecies have been described. [3] It has proven very difficult to confirm the validity of these due to individual variations, age-related variations, the relatively few available specimens (and the bright skin of the head and neck – the basis upon which several subspecies ...
Several species of birds are also cursorial, mainly those that have attained larger body sizes (ostrich, greater rhea, emu). Most of the stride length in birds comes from movements below the knee joint, because the femur is situated horizontally and the knee joint sits more towards the front of the body, placing the feet below the center of ...
This behavioral adaptation coincides with the chimpanzee's ability to distinguish kin from non-kin (referred to as visual kin selection) allowing chimps to formulate large, complex societies, where they use altruistic methods to ensure their genes persist in future generations. [7]
Urbanization causes synurbization. Animals change behaviour as required for survival. Those species that better adapt and have favourable variations in traits ultimately have higher fitness. However, while some of the behavioural adaptations are favourable for the species, consequences stem from the urbanization and impact these species.