This snow crystal formation is called a Japanese tsuzumi for its resemblance to the hourglass-shaped drum of the same name. Courtesy, Erbe, Pooley: USDA, ARS, EMU. "All of the micrographs on the web site are in the public domain and can be freely used." --Christopher Pooley. Source not available online. Reference: http://emu.arsusda.gov/snowsite/comparison/comp2.html

Source: English Wikipedia, original upload 24 March 2005 by Brian0918

Esta imagem está no domínio público porque contém elementos que provêm originalmente do Agricultural Research Service, a agência de pesquisa do Departamento da Agricultura dos Estados Unidos (United States Department of Agriculture). العربية ∙ dansk ∙ Deutsch ∙ English ∙ español ∙ فارسی ∙ français ∙ italiano ∙ 日本語 ∙ македонски ∙ മലയാളം ∙ Nederlands ∙ português ∙ sicilianu ∙ Türkçe ∙ Tiếng Việt ∙ 中文 ∙ +/−