Are Karlo, East Kvarken, the Aland archipelago, Dagd, and Osel or Oesel in the Baltic Sea; Novaya Zemlya, with Kolguyev and Vaigach, in the Barents Sea; the Solovetski Islands in the White Sea; the New Siberian archipelago, Wrangel Land and Bear Islands, off the Siberian coast; the Commander Islands off Kamchatka; the Shantar Islands and the N.
Wrangel or Kellett Island is still quite unknown.
Von Wrangel); the various coloration of many animals according to the composition of the forests they inhabit (the sable and the squirrel are well-known instances); the intermingling northern and southern faunas in the Amur region and the remarkable consequences of that intermixture in the struggle for existence; - all these render the study of the Siberian fauna most interesting.
During the war with Denmark he had his first military experience, being attached to the staff of Marshal von Wrangel; he performed valuable service in arranging the difficulties caused by the disputes between the field marshal and the other officers, and was eventually given a control over him.
In the Thirty Years' War, in June 1641, the Swedes, under Wrangel and Kdnigsmark, defeated the Austrians under the archduke Leopold at Wolfenbuttel.