Search results
Results From The WOW.Com Content Network
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.
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]
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 ...
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.
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 ...
National Geographic, with Alderfer, Paul Hess, and Noah Strycker, also published National Geographic Backyard Guide to the Birds of North America in 2011. A second edition was released in 2019. Like the pocket guide, this guide is 256 pages and outlines the 150 most common yard birds in North America.
Barn swallow nestlings have prominent red gapes, a feature shown to induce feeding by parent birds. An experiment in manipulating brood size and immune system showed the vividness of the gape was positively correlated with T-cell–mediated immunocompetence, and that larger brood size and injection with an antigen led to a less vivid gape. [71]
Western birds often make use of natural cavities such as old woodpecker holes in trees or saguaro cacti. [ 3 ] [ 11 ] The birds migrate to the Amazon basin in winter. Their winter range extends into Ecuador [ 15 ] but does not seem to ascend far up the Andean foothills.