https://creativecommons.org/publicdomain/zero/1.0/ https://www.rawpixel.com/image/325880 ![Eurasian wren (Nannus troglodytes) - Goldcrest (Regulus regulus) illustrated by the von Wright brothers. Digitally enhanced…]( "Eurasian wren (Nannus troglodytes) -… | Free public domain illustration")
Eurasian wren (Nannus troglodytes) - Goldcrest (Regulus regulus) illustrated by the von Wright brothers. Digitally enhanced from our own 1929 folio version of Svenska Fåglar Efter Naturen Och Pa Sten Ritade.
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