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  2. Tuatara - Wikipedia

    en.wikipedia.org/wiki/Tuatara

    The body temperature of tuatara is lower than that of other reptiles, ranging from 5.2–11.2 °C (41.4–52.2 °F) over a day, whereas most reptiles have body temperatures around 20 °C (68 °F). [81] The low body temperature results in a slower metabolism.

  3. Lepidosauria - Wikipedia

    en.wikipedia.org/wiki/Lepidosauria

    Purely in the context of modern taxa, Lepidosauria can be considered the sister taxon to Archelosauria, which includes Testudines (turtles), Aves (birds) and Crocodilia (crocodilians). Lepidosauria is encompassed by Lepidosauromorpha, a broader group defined as all reptiles (living or extinct) closer to lepidosaurs than to archosaurs.

  4. Bird - Wikipedia

    en.wikipedia.org/wiki/Bird

    Red-billed queleas, the most numerous species of wild bird, [196] form enormous flocks – sometimes tens of thousands strong. While some birds are essentially territorial or live in small family groups, other birds may form large flocks. The principal benefits of flocking are safety in numbers and increased foraging efficiency. [77]

  5. Reptile - Wikipedia

    en.wikipedia.org/wiki/Reptile

    This is an accepted version of this page This is the latest accepted revision, reviewed on 11 December 2024. Group of animals including lepidosaurs, testudines, and archosaurs This article is about the animal class. For other uses, see Reptile (disambiguation). Reptiles Temporal range: Late Carboniferous–Present PreꞒ Ꞓ O S D C P T J K Pg N Tuatara Saltwater crocodile Common box turtle ...

  6. Squamata - Wikipedia

    en.wikipedia.org/wiki/Squamata

    Squamata and Rhynchocephalia form the subclass Lepidosauria, which is the sister group to the Archosauria, the clade that contains crocodiles and birds, and their extinct relatives. Fossils of rhynchocephalians first appear in the Early Triassic , meaning that the lineage leading to squamates must have also existed at the time.

  7. Rhynchocephalia - Wikipedia

    en.wikipedia.org/wiki/Rhynchocephalia

    The earliest rhynchocephalians were small animals, but by the Late Triassic the group had evolved a wide range of body sizes. [48] During the Jurassic, rhynchocephalians were the dominant group of small reptiles globally, [49] reaching their apex of morphological diversity during this period, including specialised herbivorous and aquatic forms. [3]

  8. Penguin - Wikipedia

    en.wikipedia.org/wiki/Penguin

    Penguins are a group of aquatic flightless birds from the family Spheniscidae (/ s f ɪ ˈ n ɪ s ɪ d iː,-d aɪ /) of the order Sphenisciformes (/ s f ɪ ˈ n ɪ s ə f ɔːr m iː z /). [4] They live almost exclusively in the Southern Hemisphere: only one species, the Galápagos penguin, is found north of the Equator.

  9. Sauropsida - Wikipedia

    en.wikipedia.org/wiki/Sauropsida

    Sauropsida (Greek for "lizard faces") is a clade of amniotes, broadly equivalent to the class Reptilia, though typically used in a broader sense to also include extinct stem-group relatives of modern reptiles and birds (which, as theropod dinosaurs, are nested within reptiles as more closely related to crocodilians than to lizards or turtles). [2]