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Size varies considerably in different regions, with average weight from 0.7 to 2.4 kg (1 lb 9 oz to 5 lb 5 oz); males have average length 50 cm (20 in), while females are the smaller at 43 cm (17 in). [21]
Thorlaksonius platypus ranges in size from 3.5–10 mm (0.14–0.39 in). [5] It has a variable color which closely resembles the variation of Alia carinata. The color of only a single specimen has been described. This individual displayed a brown and grey body with a singular yellow band across its dorsal plates, called the pereon.
A platypus bill has three different types of receptor cells that allow the mammal to detect movement, and also the electric fields produced by the small creatures it hunts.
A marsupial has a short gestation period, typically shorter than placental. For more information on how these estimates were ascertained, see Wikipedia's articles on gestational age. The gestation figures given here are shown in days. They represent average values and should only be considered as approximations.
Platypus numbers may have more than halved over several decades, research models show, but figures are hard to pinpoint. Environment groups estimate the total population between 30,000 and 300,000.
The platypus has an average body temperature of about 31 °C (88 °F) rather than the averages of 35 °C (95 °F) for marsupials and 37 °C (99 °F) for placentals. [ 30 ] [ 31 ] Research suggests this has been a gradual adaptation to the harsh, marginal environmental niches in which the few extant monotreme species have managed to survive ...
Parts-per-million chart of the relative mass distribution of the Solar System, each cubelet denoting 2 × 10 24 kg. This article includes a list of the most massive known objects of the Solar System and partial lists of smaller objects by observed mean radius. These lists can be sorted according to an object's radius and mass and, for the most ...
In 1832, Jonathan the Seychelles giant tortoise (Aldabrachelys gigantea hololissa) was born. Although his exact birthdate is unknown, he has been given the official birthday of December 4, 1832.