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The male echidna's penis is 7 centimetres (2.8 in) long when erect, and its shaft is covered with penile spines. [29] These may be used to induce ovulation in the female. [30] It is a challenge to study the echidna in its natural habitat, and they show no interest in mating while in captivity. Prior to 2007, no one had ever seen an echidna ...
Echidna's family tree varies by author. [4] The oldest genealogy relating to Echidna, Hesiod's Theogony (c. 8th – 7th century BC), is unclear on several points. According to Hesiod, Echidna was born to a "she" who was probably meant by Hesiod to be the sea goddess Ceto, making Echidna's likely father the sea god Phorcys; however the "she" might instead refer to the Oceanid Callirhoe, which ...
The echidna spurs are vestigial and have no known function, while the platypus spurs contain venom. [42] Molecular data show that the main component of platypus venom emerged before the divergence of platypus and echidnas, suggesting that the most recent common ancestor of these taxa was also possibly a venomous monotreme.
“Attenborough’s long-beaked echidna has the spines of a hedgehog, the snout of an anteater, and the feet of a mole. Because of its hybrid appearance, it shares its name with a creature of ...
The hedgehog's back contains two large muscles that direct the quills. Some light-weight desert hedgehog species with fewer spines are more likely to flee or attack, ramming an intruder with the spines, rolling up only as a last resort. Hedgehogs are primarily nocturnal, with some species also active during the day. Hedgehogs sleep for a large ...
The fictional character Knuckles the Echidna from Sonic the Hedgehog is a red short beaked echidna who possesses superhuman strength. The short-beaked echidna is an iconic animal in contemporary Australia, notably appearing on the five-cent coin (the smallest denomination), [ 122 ] and on a $200 commemorative coin released in 1992. [ 123 ]
[17] [18] [19] In the zebrafish, two of the three vertebrate hh genes are duplicated: SHH a [20] and SHH b [21] (formerly described as tiggywinkle hedgehog, named for Mrs. Tiggy-Winkle, a character from Beatrix Potter's books for children) and ihha and ihhb [22] (formerly described as echidna hedgehog, named for the spiny anteater and not for ...
The Czech hedgehog is an antitank defense that, for Americans and Russians alike, evokes images of World War II. Moscow has a monument of Czech hedgehogs to mark the farthest that Nazi soldiers ...