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Helix is a genus of large, air-breathing land snails native to the western Palaearctic and characterized by a globular shell. [1] [2]It is the type genus of the family Helicidae, and one of the animal genera described by Carl Linnaeus [3] at the dawn of the zoological nomenclature.
They perform a "dive display" rising 2.45–3.1 m (8.0–10.2 ft) above and 1.52–1.82 m (5.0–6.0 ft) to each side of the female. If the female perches, the male begins flying in very rapid horizontal arcs less than 0.5 m (1.6 ft) in front of her. If the female is receptive to the male, she may give a call and assume a solicitous posture ...
The smallest is the 5 cm (2.0 in) bee hummingbird, which weighs less than 2.0 g (0.07 oz), and the largest is the 23 cm (9 in) giant hummingbird, weighing 18–24 grams (0.63–0.85 oz). Noted for long beaks , hummingbirds are specialized for feeding on flower nectar , but all species also consume small insects.
[4] [5] Compared to other small hummingbirds, which often have a slender appearance, the bee hummingbird looks rounded and plump. [5] Female bee hummingbirds are bluish green with a pale gray underside. [5] The tips of their tail feathers have white spots. During the mating season, males have a reddish to pink head, chin, and throat.
If owners lose their car manual, they can either order a replacement from a dealer, pick up a used one secondhand, or download a PDF version of the manual online. [4] In 2017, IBM released IBM Watson Artificial Intelligence to understand and answer questions in natural driver language. [5] "Ask Mercedes" was the first in a wave of these vehicle ...
Hummingbird Ltd. (previously NASDAQ: HUMC, TSX: HUM) is a subsidiary of OpenText and is a provider of enterprise software products including Exceed. Initially founded as a consulting business in 1984, Hummingbird moved into the connectivity market.
The efficiency can be plotted versus the helix angle for a constant friction, as shown in the adjacent diagram. The maximum efficiency is a helix angle between 40 and 45 degrees, however a reasonable efficiency is achieved above 15°. Due to difficulties in forming the thread, helix angle greater than 30° are rarely used.
The first edition of The Merck Manual was published in 1899 by Merck & Co., Inc. for physicians and pharmacists and was titled Merck's Manual of the Materia Medica. [6] [7] The 192 page book which sold for US $1.00, was divided into three sections, Part I ("Materia Medica") was an alphabetical listing of all known compounds thought to be of therapeutic value with uses and doses; Part II ...