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Cicada. The cicadas ( / sɪˈkɑːdəz, - ˈkeɪ -/) are a superfamily, the Cicadoidea, of insects in the order Hemiptera (true bugs). They are in the suborder Auchenorrhyncha, [a] along with smaller jumping bugs such as leafhoppers and froghoppers. The superfamily is divided into two families, the Tettigarctidae, with two species in Australia ...
The YES stroke alphabetical order, also called YES stroke-order sorting, briefly YES order or YES sorting, is a Chinese character sorting method based on a stroke alphabet and stroke orders. It is a simplified stroke-based sorting method free of stroke counting and grouping. [1] [2] [3] YES order has been applied to the indexing of Xinhua ...
Below are two tables which report the average adult human height by country or geographical region. With regard to the first table, original studies and sources should be consulted for details on methodology and the exact populations measured, surveyed, or considered. With regard to the second table, these estimated figures for adult human ...
- Etymology
- Physical Characteristics
- Diet
- Habitat
- Anatomy
- Reproduction
- Threats
- Evolution
- Taxonomy
- As Food
Echidnas are possibly named after Echidna, a creature from Greek mythology who was half-woman, half-snake, as the animal was perceived to have qualities of both mammals and reptiles.[citation needed]An alternative explanation is a confusion with Ancient Greek: ἐχῖνος, romanized: ekhînos, lit. 'hedgehog, sea urchin'.
Echidnas are medium-sized, solitary mammals covered with coarse hair and spines. The spines are modified hairs and are made of keratin, the same fibrous protein that makes up fur, claws, nails, and horn sheaths in animals. Superficially, they resemble the anteaters of South America and other spiny mammals such as hedgehogs and porcupines. They are ...
The short-beaked echidna's diet consists mostly of ants and termites, while the Zaglossus (long-beaked) species typically eat worms and insect larvae. The tongues of long-beaked echidnas have sharp, tiny spines that help them capture their prey. They have no teeth, so they break down their food by grinding it between the bottoms of their mouths and...
Echidnas do not tolerate extreme temperatures; they shelter from harsh weather in caves and rock crevices. Echidnas are found in forests and woodlands, hiding under vegetation, roots or piles of debris. They sometimes use the burrows (both abandoned and in use) of animals such as rabbits and wombats. Individual echidnas have large, mutually overlap...
Echidnas and platypuses are the only egg-laying mammals, the monotremes.The average lifespan of an echidna in the wild is estimated at 14–16 years. Fully grown females can weigh about 4.5 kilograms (9.9 lb), the males 33% larger, at about 6 kilograms (13 lb).Though the internal reproductive organs differ, both sexes possess an identical single cloa...
The female lays a single soft-shelled, leathery egg 22 days after mating, and deposits it directly into her pouch. An egg weighs 1.5 to 2 grams (0.05 to 0.07 oz) and is about 1.4 centimetres (0.55 in) long. While hatching, the baby echidna opens the leather shell with a reptile-like egg tooth. Hatching takes place after 10 days of gestation; the yo...
Echidnas are very timid. When frightened, they attempt to partially bury themselves and curl into a ball similar to a hedgehog. Strong front arms allow echidnas to dig in and hold fast against a predator pulling them from the hole. Their many predators include feral cats, foxes, domestic dogs, and goannas. Snakes pose a large threat when they slith...
The divergence between oviparous (egg-laying) and viviparous (offspring develop internally) mammals is believed to date to the Triassic period.Most findings from genetics studies (especially of nuclear genes) are in agreement with the paleontological dating, but some other evidence, like mitochondrial DNA, give slightly different dates. Molecular c...
Echidnas are a small clade with two extant genera and four species. The genus Zaglossus includes three extant and two fossil species, with only one extant species from the genus Tachyglossus.
The Kunwinjku people of Western Arnhem Land (Australia) call the echidna ngarrbek, and regard it as a prized food and "good medicine"[note 1] The echidna is hunted at night, gutted, and filled with hot stones and mandak (Persoonia falcata) leaves. According to Larrakiaelders Una Thompson and Stephanie Thompson Nganjmirra, once captured, an echidna ...
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0 (zero) is a number representing an empty quantity. Adding 0 to any number leaves that number unchanged. In mathematical terminology, 0 is the additive identity of the integers, rational numbers, real numbers, and complex numbers, as well as other algebraic structures. Multiplying any number by 0 has the result 0, and consequently, division ...
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