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  2. Monotreme - Wikipedia

    en.wikipedia.org/wiki/Monotreme

    Monotremes (/ ˈ m ɒ n ə t r iː m z /) are mammals of the order Monotremata. They are the only group of living mammals that lay eggs, rather than bearing live young. The extant monotreme species are the platypus and the four species of echidnas. Monotremes are typified by structural differences in their brains, jaws, digestive tract ...

  3. Mammalian reproduction - Wikipedia

    en.wikipedia.org/wiki/Mammalian_reproduction

    However, the five species of monotreme, the platypuses and the echidnas, lay eggs. The monotremes have a sex determination system different from that of most other mammals. [ 2 ] In particular, the sex chromosomes of a platypus are more like those of a chicken than those of a therian mammal.

  4. Hatchling - Wikipedia

    en.wikipedia.org/wiki/Hatchling

    The behavior of an amphibian hatchling, commonly referred to as a tadpole, is controlled by a few thousand neurons. [4] 99% of a Xenopus hatchling's first day after hatching is spent hanging from a thread of mucus secreted from near its mouth will eventually form; if it becomes detached from this thread, it will swim back and become reattached, usually within ten seconds. [4]

  5. Platypus - Wikipedia

    en.wikipedia.org/wiki/Platypus

    Together with the four species of echidna, it is one of the five extant species of monotremes, mammals that lay eggs instead of giving birth to live young. [6] Like other monotremes, the platypus has a sense of electrolocation, which it uses to detect prey in cloudy water. [7]

  6. List of monotremes and marsupials - Wikipedia

    en.wikipedia.org/wiki/List_of_monotremes_and...

    The class Mammalia is divided into two subclasses based on reproductive techniques: egg-laying mammals (yinotherians or monotremes - see also Australosphenida), and mammals which give live birth . The latter subclass is divided into two infraclasses: pouched mammals ( metatherians or marsupials ), and placental mammals ( eutherians , for which ...

  7. Endangered egg-laying mammal seen for the first time in over ...

    www.aol.com/news/endangered-egg-laying-mammal...

    Echidnas are monotremes, which means they are part of the only group of living mammals that lays eggs instead of bearing live young, he explained. There are only five existing species of ...

  8. Lost echidna: Egg-laying mammal named after David ... - AOL

    www.aol.com/strange-egg-laying-mammal-named...

    The egg-laying mammal, named after broadcaster Sir David Attenborough, was last seen by scientists in 1961. It was spotted using camera traps set up in the Cyclops Mountains of Indonesia’s Papua ...

  9. Maternal behavior in vertebrates - Wikipedia

    en.wikipedia.org/wiki/Maternal_behavior_in...

    [1] [15] Many cichlid species, such as Cichla ocellaris, will also remove underdeveloped eggs from the clutch, a behavior performed by both parents. [15] Many female cichlids also fan their eggs with their fins, especially in slower moving water, in order to increase oxygenation and get rid of build up of undesired materials around the eggs. [15]