Tobar Rainbow Humming Top Traditional Spinning Toy

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Sexual dimorphisms in bill size and shape are also present between male and female hummingbirds, [65] where in many clades, females have longer, more curved bills favored for accessing nectar from tall flowers. [66] For males and females of the same size, females tend to have larger bills. [65] a b c d "Hummingbirds' 22-million-year-old history of remarkable change is far from complete". ScienceDaily. 3 April 2014 . Retrieved 30 September 2014. Male rufous and broad-tailed hummingbirds (genus Selasphorus) have a distinctive wing feature during normal flight that sounds like jingling or a buzzing shrill whistle – a trill. [166] The trill arises from air rushing through slots created by the tapered tips of the ninth and tenth primary wing feathers, creating a sound loud enough to be detected by female or competitive male hummingbirds and researchers up to 100m away. [166] Many hummingbird species exhibit a diverse vocal repertoire of chirps, squeaks, whistles and buzzes. [82] [83] Vocalizations vary in complexity and spectral content during social interactions, foraging, territorial defense, courtship, and mother-nestling communication. [82] Territorial vocal signals may be produced in rapid succession to discourage aggressive encounters, with the chirping rate and loudness increasing when intruders persist. [82] During the breeding season, male and female hummingbirds vocalize as part of courtship. [82]

EggHammerTankII · Egg Bomber Tank · Egg Totem · Aero Egg · Egg Saucer · Egg-Go-Round · Egg Frog · Super Eggrobo Z · True Area 53 bossTames, Richard; Williams, Brian (2003). Ancient Roman Children. Capstone Classroom. p.24. ISBN 978-1-4034-0518-0. a b McGuire, Jimmy A.; Witt, Christopher C.; Remsen, J.V. Jr.; Dudley, R.; Altshuler, Douglas L. (2008). "A higher-level taxonomy for hummingbirds". Journal of Ornithology. 150 (1): 155–165. doi: 10.1007/s10336-008-0330-x. ISSN 0021-8375. S2CID 1918245. A spinning top, or simply a top, is a toy with a squat body and a sharp point at the bottom, designed to be spun on its vertical axis, balancing on the tip due to the gyroscopic effect. The Jean Shepherd story "Scut Farkas and the Murderous Mariah" revolves around top-spinning in the fictional Depression-era American city of Hohman, Indiana. The bully and the named top in the title are challenged by Shepherd's ongoing protagonist Ralph and a so-called "gypsy top" of similar design to Mariah named Wolf. [10] Tobalske, Bret W.; Altshuler, Douglas L.; Powers, Donald R. (March 2004). "Take-off mechanics in hummingbirds (Trochilidae)". The Journal of Experimental Biology. 207 (Pt 8): 1345–52. doi: 10.1242/jeb.00889. PMID 15010485. S2CID 12323960.

Hummingbirds". Migratory Bird Center, Smithsonian National Zoological Park. Archived from the original on 16 July 2012 . Retrieved 1 April 2013. The heart rate of hummingbirds can reach as high as 1,260 beats per minute, a rate measured in a blue-throated hummingbird with a breathing rate of 250 breaths per minute at rest. [6] [103] Heat dissipation [ edit ] During cold temperatures, Anna's hummingbirds gradually gain weight during the day as they convert sugar to fat. [118] [119] In addition, hummingbirds with inadequate stores of body fat or insufficient plumage are able to survive periods of subfreezing weather by lowering their metabolic rate and entering a state of torpor. [120] Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With about 366 species and 113 genera, [1] they occur from Alaska to Tierra del Fuego, but most species are found in Central and South America. [2] About 28 hummingbird species are listed as endangered or critically endangered, with numerous species declining in population. [2] [3]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

The hummingbird evolutionary tree shows that one key evolutionary factor appears to have been an altered taste receptor that enabled hummingbirds to seek nectar. [48] Perception of sweetness in nectar evolved in hummingbirds during their genetic divergence from insectivorous swifts, their closest bird relatives. [197] Although the only known sweet sensory receptor, called T1R2, [198] is absent in birds, receptor expression studies showed that hummingbirds adapted a carbohydrate receptor from the T1R1- T1R3 receptor, identical to the one perceived as umami in humans, essentially repurposing it to function as a nectar sweetness receptor. [197] This adaptation for taste enabled hummingbirds to detect and exploit sweet nectar as an energy source, facilitating their distribution across geographical regions where nectar-bearing flowers are available. [197] Tongue as a micropump [ edit ] Drawing of a hummingbird tongue; 1874, unknown artist. Upon reaching nectar in a flower, the tongue splits into opposing tips fringed with lamellae and grooves, which fill with nectar, then retracts to a cylindrical configuration into the bill to complete the drink. [199] [200] Jun'ichi Kanemaru ( Sonic) | Chikao Ōtsuka ( Eggman, Eggman Nega) | Ryō Hirohashi ( Tails) | Nao Takamori ( Blaze) | Shinya Fukumatsu ( Captain Whisker) | Kota Nemoto ( Johnny)

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.