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  2. Bird egg - Wikipedia

    en.wikipedia.org/wiki/Bird_egg

    In a 2017 publication in the journal Science, mathematical modeling of 50,000 bird eggs data showed that bird egg shape is a product of flight adaptations and not the outcome of nesting conditions or a bird's life history. [16]

  3. Matryoshka doll - Wikipedia

    en.wikipedia.org/wiki/Matryoshka_doll

    Matryoshka dolls may have been inspired by a nesting doll imported from Japan. [5] [7] The Children's Education workshop where Zvyozdochkin was a lathe operator received a five piece, cylinder-shaped nesting doll featuring Fukuruma in the late 1890s, [8] which is now part of the collection at the Sergiev Posad Museum of Toys. [8]

  4. Oology - Wikipedia

    en.wikipedia.org/wiki/Oology

    Legislation, such as the Protection of Birds Act 1954 and Wildlife and Countryside Act 1981 in the United Kingdom, has made it impossible to collect wild birds' eggs legally. In the United Kingdom, it is only legal to possess a wild-bird's egg if it was taken before 1954, or with a permit for scientific research; selling wild birds' eggs ...

  5. Egg incubation - Wikipedia

    en.wikipedia.org/wiki/Egg_incubation

    In general smaller birds tend to hatch faster, but there are exceptions, and cavity nesting birds tend to have longer incubation periods. It can be an energetically demanding process, with adult albatrosses losing as much as 83 g of body weight a day. [6] Megapode eggs take from 49 to 90 days depending on the mound and ambient temperature.

  6. Common cuckoo - Wikipedia

    en.wikipedia.org/wiki/Common_cuckoo

    The cuckoo, common cuckoo, European cuckoo or Eurasian cuckoo (Cuculus canorus) is a member of the cuckoo order of birds, Cuculiformes, which includes the roadrunners, the anis and the coucals. This species is a widespread summer migrant to Europe and Asia, and winters in Africa.

  7. Bird nest - Wikipedia

    en.wikipedia.org/wiki/Bird_nest

    Deep cup nest of the great reed-warbler. A bird nest is the spot in which a bird lays and incubates its eggs and raises its young. Although the term popularly refers to a specific structure made by the bird itself—such as the grassy cup nest of the American robin or Eurasian blackbird, or the elaborately woven hanging nest of the Montezuma oropendola or the village weaver—that is too ...

  8. How Nutcrackers Became a Classic Symbol of Christmas

    www.aol.com/nutcrackers-became-classic-symbol...

    Nutcracker dolls can trace their little wooden development back to the Ore Mountains of Germany in the late 17th century. Most often depicted as toy soldiers, they became gifts and symbols of good ...

  9. Fecal sac - Wikipedia

    en.wikipedia.org/wiki/Fecal_sac

    Scientists can use fecal sacs to learn a number of things about individual birds. Examination of the contents of the sac can reveal details of the nestling's diet, [14] [15] and can indicate what contaminants the young bird has been exposed to. [16] The presence of an adult bird carrying a fecal sac is used in bird censuses as an indication of ...

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