The songbirds are by far the largest taxon of the birds with over 90 described families and about 5000 species. The sounds are generated by tensioning membranes and causing them to vibrate. This can only be done when exhaling. Some birds sing very melodiously, such as the blackbird or the nightingale others have rather crowing voices such as the crows.
Format | ISBN/EAN | Preis |
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300 × 300 mm Wand |
24.99 £ 29.99 € |
jeweils 14 Seiten
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