Canada is an immense country with much of its wilderness areas still intact. While there are no country endemics among its roughly 640 bird species, birders will find much to enjoy about exploring Canada's remote mountains, rocky coastlines, vast prairies, quaking peat bogs, extensive tundra, and its thick deciduous forests. Canada is known for its abundance of boreal birds and its suite of irruptive winter finches such as Common and Hoary Redpoll, Evening Grosbeak, Red-breasted Nuthatch, White-winged and Red Crossbill, Pine Siskin, and Purple Finch. Snowy Owls are also irruptive; though they breed and overwinter in the frozen tundra, when food is scarce they make mass southerly movements, and thus are not uncommon winter visitors in the northern United States. Thirty six species of wood-warblers are abundant in spring along the northern shore of the Great Lakes, Point Pelee National Park being one of its hottest hotspots. Colonial seabirds, such as Atlantic Puffins and the massive nesting colony of Northern Gannet at Cape St. Mary’s Ecological Preserve in Newfoundland, are found along its picturesque eastern coast. Canada is also also home to large, charismatic mammals such as moose, wolves, whales, seals, and polar bears.