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Various studies have shown that adult birds that underwent stress during critical developmental periods produce less complex songs and have smaller HVC brain regions. [ 117 ] [ 118 ] This has led some researchers to hypothesize that sexual selection for more complex songs indirectly selects for stronger cognitive ability in males. [ 119 ]
Adult weight (grams) Incubation (days) Clutches (per year) Clutch size Ruby-throated hummingbird (Archilochus colubris) 3 13 2.0 2 House sparrow (Passer domesticus) 25 11 4.5 5 Greater roadrunner (Geococcyx californianus) 376 20 1.5 4 Turkey vulture (Cathartes aura) 2,200 39 1.0 2 Laysan albatross (Phoebastria immutabilis) 3,150 64 1.0 1
Children learning the violin often use "fractional-sized" violins: 3/4, 1/2, 1/4, 1/8, 1/10, 1/16, and sometimes even 1/32 sized instruments are used. These numbers do not represent numerically accurate size relationships, i.e., a "1/2 size" violin is not half the length of a full-sized violin.
The genus Sula was introduced by the French zoologist Mathurin Jacques Brisson in 1760. [3] The type species is the brown booby. [4] The name is derived from súla, the Old Norse and Icelandic word for the other member of the family Sulidae, the gannet. [5]
Suzuki pioneered the idea that a preschool age child could learn to play the violin if the learning steps were small enough and the instrument was scaled down to fit their body. He modeled his method, which he called "Talent Education" ( 才能教育 , sainō kyōiku ) , after his theories of natural language acquisition .
This smart bird feeder includes a Wi-Fi-enabled camera to capture your visitors, and with AI (artificial intelligence) to identify and categorize each species, all displayed for you in a Bird ...
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A new sex trend among college students is getting attention on TikTok − and it has doctors worried.. That trend is using honey packets, a controversial supplement marketed for sexual enhancement ...
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