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Tobar Rainbow Humming Top Traditional Spinning Toy

£8.3£16.60Clearance
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The Gibson Hummingbird is an acoustic guitar model described as having the shape of a hummingbird by Gibson Brands, a major guitar manufacturer. [232] Maxwell, James Clerk (2003). The Scientific Papers of James Clerk Maxwell. Dover Publications. ISBN 0-486-49560-4.

Fjeldså, J.; Heynen, I. (1999). Genus Oreotrochilus. In: del Hoyo, J., A. Elliott, & J. Sargatal. eds. (1999). Handbook of the Birds of the World. Vol. 5. Barn-owls to Hummingbirds. Lynx Edicions, Barcelona. pp.623–624. ISBN 84-87334-25-3. Modern tops have several sophisticated improvements, such as ball bearings of ruby or a hard ceramic like tungsten carbide, that reduces the friction with the ground surface. Functional art tops have become collectibles built using varied techniques in metal-working, glass-working, and wood-working. Akatento · Aotento · Ape · Bu-Bu · Buzzer · Clam · Condor · Gaogao · Gekogeko · Ginpe · Guards · Guruguru · Hariisen · Jousun · Juggling · Kamaki · Kyacchaa · Marun · Minimole · Muukaden · Spina · Takkon · Uutsubo · Yadokk · Yukigasen Altschuler, D. L. (2003). "Flower color, hummingbird pollination, and habitat irradiance in four Neotropical forests". Biotropica. 35 (3): 344–355. doi: 10.1646/02113. S2CID 55929111. Although hummingbird eyes are small in diameter (5–6mm), they are accommodated in the skull by reduced skull ossification, and occupy a larger proportion of the skull compared to other birds and animals. [74] Further, hummingbird eyes have large corneas, which comprise about 50% of the total transverse eye diameter, combined with an extraordinary density of retinal ganglion cells responsible for visual processing, containing some 45,000 neurons per mm 2. [75] The enlarged cornea relative to total eye diameter serves to increase the amount of light perception by the eye when the pupil is dilated maximally, enabling nocturnal flight. [75]The shapes of hummingbird beaks (also called bills) vary widely as an adaptation for specialized feeding, [65] [66] with some 7000 flowering plants pollinated by hummingbird nectar feeding. [193] Hummingbird beak lengths range from about 6 millimetres (0.24in) to as long as 110 millimetres (4.3in). [194] When catching insects in flight, a hummingbird's jaw flexes downward to widen the beak for successful capture. [181] Behaviorally, the trill serves several purposes: It announces the sex and presence of a male bird; it provides audible aggressive defense of a feeding territory and an intrusion tactic; it enhances communication of a threat; and it favors mate attraction and courtship. [166] Migration [ edit ] For those who love the game of curling, you can actually play it with spinning tops as well. All you need is some sidewalk chalk to draw circle targets on the ground. Then spin the tops and try to have them land within the targets. Assign points to the targets so you can see who wins.

Barrier Angler | Bomb Ghost | Crystal Head | Dive Bat | Eleki Angler | Kaizoku Bomb | Kaizoku Glider | Kaizoku Gun | Kaizoku Hogan | Kaizoku Hover Bomb | Kaizoku Hover Gunner | Kaizoku Skeleton | Kaizoku Snowball | Kaizoku Sword | Nibbles | Ptera | Rapid Crab | Shisaku-gata Dump | Shisaku-gata Jet | Shisaku-gata Spanner | Skull Fire | Sky Moon | Triceratank Typically the top will at first wobble until friction and torque between the tip and the underlying surface force it to spin with the axis steady and upright. Contrary to what is sometimes assumed, longstanding scientific studies (and easy experimentations reproducible by anyone) show that reducing the friction increases the time needed to reach this stable state (unless the top is so unbalanced that it falls over before reaching it). [7] After spinning upright (in the so-called "sleep" position) for an extended period, the angular momentum will gradually lessen (mainly due to friction), leading to ever increasing precession, finally causing the top to topple and roll some distance on its side. In the "sleep" period, and only in it, provided it is ever reached, less friction means longer "sleep" time (whence the common error that less friction implies longer global spinning time). A phylogenetic tree unequivocally indicates that modern hummingbirds originated in South America, with the last common ancestor of all living hummingbirds living around 22 million years ago. [8] Moisset, Beatriz (2022). "Hummingbird moth (Hemaris spp.)". Forest Service, US Department of Agriculture . Retrieved 2 August 2022. Generally, birds have been assessed to vocalize and hear in the range of 2–5 kHz, with hearing sensitivity falling with higher frequencies. [85] In the Ecuadorian hillstar ( Oreotrochilus chimborazo), vocalizations were recorded in the wild to be at a frequency above 10 kHz, well outside of the known hearing ability of most birds. [85] Song system nuclei in the hummingbird brain are similar to those songbird brains, but the hummingbird brain has specialized regions involved for song processing. [82] Metabolism [ edit ]

Fossil hummingbirds are known from the Pleistocene of Brazil and the Bahamas, but neither has yet been scientifically described, and fossils and subfossils of a few extant species are known. Until recently, older fossils had not been securely identifiable as those of hummingbirds. During torpor, to prevent dehydration, the kidney function declines, preserving needed compounds, such as glucose, water, and nutrients. [109] The circulating hormone, corticosterone, is one signal that arouses a hummingbird from torpor. [128] Trinidad and Tobago, known as "The land of the hummingbird," displays a hummingbird on that nation's coat of arms, [228] 1-cent coin, [229] and livery on its national airline, Caribbean Airlines. [230] According to the International Union for Conservation of Nature Red List of Threatened Species in 2023, 9 hummingbird species are classified as critically endangered, 17 are endangered, 11 are vulnerable, and 22 species are near-threatened. [24] Male ruby-throated hummingbird ( Archilochus colubris)

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