A. H. Twitchell

30 public-domain plates in the archive

• Ursus americanus 3 Sep 1924
• Ursus americanus 3 Sep 1925
• Ursus arctos 11 Sep 1915
• Microtus oeconomus operarius 8 Oct 1914
• Ursus arctos 12 May 1917
• Sorex monticola shumaginensis 15 Dec 1934
• Zapus hudsonius alascensis 7 Aug 1917
• Ursus americanus 12 Oct 1918
• Microtus oeconomus operarius 29 May 1932
• Bombus (Pyrobombus) sylvicola 6 Jun 1920
• Ursus americanus 1 Sep 1918
• Ursus americanus 10 Nov 1915
• Bombus (Pyrobombus) sitkensis 9 Jun 1920
• Microtus pennsylvanicus tananaensis 29 Mar 1925
• Ursus arctos 30 Apr 1925
• Lepus othus othus 22 Jan 1917
• Ursus arctos 30 Jul 1917
• Ursus americanus 26 Jul 1917
• Rangifer tarandus groenlandicus 25 Oct 1919
• Ursus americanus 22 Aug 1920
• Ursus arctos 8 Oct 1921
• Ursus americanus 18 Jul 1916
• Marmota caligata caligata 16 May 1917
• Ursus americanus 11 Oct 1918
• Lemmus trimucronatus yukonensis 27 Apr 1917
• Lepus othus othus 20 Jan 1917
• Rangifer tarandus groenlandicus 25 Jan 1917
• Ursus arctos 20 Jul 1922
• Lepus othus othus 20 Jan 1917
• Rangifer tarandus groenlandicus 22 Oct 1918