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2008
Døíve bìnì pouívaný název pampelika lékaøská (Tara-xacum officinale WIGG.) by dnes ji nemìl být uvádìn. Pøijme-me-li podrobnìjí dìlení rodu Taraxacum (1), zjistíme, e rost-liny, popsané jako T. officinalis, se v podmínkách støední Evropy nevyskytují (rostou pouze v severní èásti kontinentu). I kdy v následujícím textu budeme pro zjednoduení pouívat termí-ny pampelika èi pampeliky, vdy se jedná o sekci Rudera-lia (Taraxacum sect. Ruderalia KIRCHNER, R. ØLLGAARD et TÌPÁNEK). V rámci této sekce je pak rozliováno znaèné mnoství druhù, na naem území jich pravdìpodobnì roste kolem 250. Z pohledu biologie a moností regulace je vak vcelku zbyteèné mezi nimi rozliovat (vzhledem k nedostupnosti spo-lehlivých klíèù je to dokonce nemoné). Urèité zmìny mùeme zaznamenat i v pøípadì èeského názvu celého rodu. Dlouho byl v èetinì preferován název smetánka a jako pampelika byl oznaèován rod Leontodon (dnes máchelka). Ji od konce 80. let 20. století je vak, coby správné, ...
Yellowhammer – Bird of the Year 2011 The yellowhammer (Emberiza citrinella) is a common bunting species that can easily be recognized by the varying amount of yellow coloration on the head and underparts, streaked warm brown upperparts, bright white outer tail feathers and redbrown rump. The intensity of yellow coloration increases with age and reflects the male quality. The simple, yet pleasant song often transcribed as “Little bit of bread and no cheese” can be heard up to late summer. A typical song consists of an initial part, which is inherited, and a closing drawn-out part that is learned. Across Europe, there is a remarkable mosaic of yellowhammer dialects which differ in the relative pitch of the elements in the closing phrase, resulting in distinct melodies at the end of the song. Yellowhammers feed on invertebrates, but from September to April, plant diet predominates, especially grains of grasses and cereals as well as weed seeds. Nestling food comprises mainly of arthrop...
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