Robert Thompson / Engrailed moth (Ectropis crepuscularia) camouflaged on tree trunk, River Bann Banbridge, County Down, Northern Ireland.

Robert Thompson / Engrailed moth (Ectropis crepuscularia) camouflaged on tree trunk, River Bann Banbridge, County Down, Northern Ireland.

Robert Thompson / Engrailed moth (Ectropis crepuscularia) camouflaged on tree trunk, River Bann Banbridge, County Down, Northern Ireland.

Robert Thompson / Engrailed moth (Ectropis bistortata) resting, Annagariff Wood National Nature Reserve, Peatlands Park, County Armagh, Northern Ireland, UK. April.

Paul D Stewart / 1837 illustration of Greenland / Bowhead Whale (Balaena mysticetus) breaching, from Jardine's 'Naturalist's Library', Whales, Plate 23 Volume VI, from artwork of Stewart engraved by W. H. Lizars. Ori...

Bryan and Cherry Alexander / Elaborately engraved herd of Walrus on a small walrus ivory tusk. Uelen, Chukotka, Siberia, Russia.

Paul D Stewart / Portrait of Richard Owen and Moa leg (20, July 1804 - 18 December 1892) photo-engraved by Walker and Boutall around 1894 from an 1846 Daguerrotype. Owen was a comparative anatomist and palaeontologist...

Paul D Stewart / 1837 illustration of lesser Rorqual (now more commonly known as Minke whale Balaenoptera acuto-rostrata) beached and tied. From Jardine's 'Naturalist's Library', Whales, Volume VI, from artwork of Ste...

Paul D Stewart / Illustration of 'Beagle laid ashore, River Santa Cruz'. Copperplate engraving, art by Conrad Martens, engraved by T. Landseer. Published by H. Colburn 1838. Plate from 'The Narrative of the Surveying...