Large and widely recognized wildlife mammals found in Finland are the brown bear, gray wolf, wolverine, and elk. The brown bear, which is also nicknamed as the "king of the forest" by the Finns, is the country's official national animal, which also occur on the coat of arms of the Satakunta region is a crown-headed black bear carrying a sword, possibly referring to the regional capital city of Pori, whose Swedish name ''Björneborg'' and the Latin name ''Arctopolis'' literally means "bear city" or "bear fortress". Three of the more striking birds are the whooper swan, a large European swan and the national bird of Finland; the Western capercaillie, a large, black-plumaged member of the grouse family; and the Eurasian eagle-owl. The latter is considered an indicator of old-growth forest connectivity, and has been declining because of landscape fragmentation. Around 24,000 species of Insects are prevalent in Finland some of the most common being hornets with tribes of beetles such as the Onciderini also being common. The most common breeding birds are the willow warbler, common chaffinch, and redwing. Of some seventy species of freshwater fish, the northern pike, perch, and others are plentiful. Atlantic salmon remains the favourite of fly rod enthusiasts.