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  2. Emlen funnel - Wikipedia

    en.wikipedia.org/wiki/Emlen_funnel

    An ink pad is placed on the bottom, so when the bird hops or flutters onto the sloping walls it leaves a track before slipping back down again. The bird's view through the top of the cage can be manipulated to show how it responds to different apparent "star patterns" (actually generated in a planetarium ).

  3. Viola pedata - Wikipedia

    en.wikipedia.org/wiki/Viola_pedata

    Viola pedata, the birdsfoot violet, bird's-foot violet, or mountain pansy, is a violet native to sandy areas in central and eastern North America. Varieties [ edit ]

  4. Sexual selection in birds - Wikipedia

    en.wikipedia.org/wiki/Sexual_selection_in_birds

    Bird species often demonstrate intersexual selection, perhaps because – due to their lightweight body structures – fights between males may be ineffective or impractical. Therefore, male birds commonly use the following methods to try to seduce the females: Colour: Some species have ornate, diverse, and often colourful feathers.

  5. Bird vocalization - Wikipedia

    en.wikipedia.org/wiki/Bird_vocalization

    Bird vocalization includes both bird calls and bird songs. In non-technical use, bird songs (often simply birdsong ) are the bird sounds that are melodious to the human ear. In ornithology and birding , songs (relatively complex vocalizations) are distinguished by function from calls (relatively simple vocalizations).

  6. Viola - Wikipedia

    en.wikipedia.org/wiki/Viola

    The viola's bow has a wider band of horsehair than a violin's bow, which is particularly noticeable near the frog (or heel in the UK). Viola bows, at 70–74 g (2.5–2.6 oz), are heavier than violin bows (58–61 g [2.0–2.2 oz]). The profile of the rectangular outside corner of a viola bow frog generally is more rounded than on violin bows.

  7. List of Viola species - Wikipedia

    en.wikipedia.org/wiki/List_of_Viola_species

    This is a list of species in the plant genus Viola, often known as violets or pansies. Viola is the largest genus in the family Violaceae, containing over 680 species. [1] Although similarly named, neither African violets nor dogtooth violets are closely related to the true violas.

  8. American Viola Society - Wikipedia

    en.wikipedia.org/wiki/American_Viola_Society

    The American Viola Society (AVS) is an organization headquartered in Dallas, Texas that encourages excellence in performance, pedagogy, research, composition, and lutherie by fostering communication and friendship among violists of all skill levels, ages, nationalities, and backgrounds.

  9. Viola Spolin - Wikipedia

    en.wikipedia.org/wiki/Viola_Spolin

    Viola Spolin (November 7, 1906 — November 22, 1994) was an American theatre academic, educator and acting coach. She is considered an important innovator in 20th century American theater for creating directorial techniques to help actors to be focused in the present moment and to find choices improvisationally, as if in real life. [ 1 ]