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  2. Nest box - Wikipedia

    en.wikipedia.org/wiki/Nest_box

    A nest box, also spelled nestbox, is a man-made enclosure provided for animals to nest in. Nest boxes are most frequently utilized for birds, in which case they are also called birdhouses or a birdbox/bird box, but some mammals such as bats may also use them. Placing nestboxes or roosting boxes may also be used to help maintain populations of ...

  3. Owl hole - Wikipedia

    en.wikipedia.org/wiki/Owl_hole

    The entry holes are usually oblong and six to nine inches (152–228 mm) [3] that permits a single bird to enter with space for a safe landing and passage to the interior whilst at the same time excluding larger predators. [1] Owl holes without landing platforms had grooves or rough surfaces beneath the hole to aid grip.

  4. Pigeonhole principle - Wikipedia

    en.wikipedia.org/wiki/Pigeonhole_principle

    Pigeon-hole messageboxes at Stanford University. Dirichlet published his works in both French and German, using either the German Schubfach or the French tiroir.The strict original meaning of these terms corresponds to the English drawer, that is, an open-topped box that can be slid in and out of the cabinet that contains it.

  5. Dovecote - Wikipedia

    en.wikipedia.org/wiki/Dovecote

    Dovecote at Nymans Gardens, West Sussex, England A dovecote at Najafabad, Iran Pigeon tower in Kavastu, Estonia (built 1869) A dovecote at Mazkeret Batya, Israel A dovecote or dovecot / ˈ d ʌ v k ɒ t /, doocot or columbarium is a structure intended to house pigeons or doves. [1]

  6. 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 ...

  7. Bird measurement - Wikipedia

    en.wikipedia.org/wiki/Bird_measurement

    Bird measurement or bird biometrics are approaches to quantify the size of birds in scientific studies. The variation in dimensions and weights across birds is one of the fundamental sources of diversity among birds, and even Within species, dimensions may vary across populations within species, between the sexes and depending on age and ...

  8. Tree hollow - Wikipedia

    en.wikipedia.org/wiki/Tree_hollow

    Tree holes can be caused when an injury to the tree, such as breakage of a limb, creates an opening through the bark and exposes the sapwood. The sapwood is attacked by fungi and bacteria, which form a cavity in the bole of the tree. The resulting cavity can fill with water, thus becoming a type of phytotelma. Therefore, there are wet and dry ...

  9. Horizontal top-bar hive - Wikipedia

    en.wikipedia.org/wiki/Horizontal_top-bar_hive

    Although guidebooks for use in Africa often give precise dimensions for the Kenyan hive, and encourage beekeepers to keep their equipment of uniform and thus interchangeable sizes, one of the main selling points of the KTBH among proponents from English speaking countries is the fact that it can be made to practically any size and shape, as long as the top bars have an appropriate width.