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"mediterrranean" - 1 õppematerjal

Tundra swans
50
odp

Tundra swans

● Can be aggressive in defence of their nests Breeding ● Lay an average of four eggs ● Female broods for 36 days ● The cygnets do not reach the ability of flight before an age of 120 to 150 days Distribution and habitat ● Found naturally mainly in temperate areas of Europe across western Asia ● Partically migratory throughout northern latitudes in Europe and Asia, as far south as north Africa and the Mediterrranean ● Also founded in Iceland Distribution of tundra swan ● Difficult to differentiate ● Breeds in the Arctic, subarctic tundra ● Inhabit – shallow pools, lakes and rivers ● Migratory birds ● The breeding range extends across the coastal lowlands of Siberia to the Pacific ● Start to arrive around mid-May, leave for winter the end of September Ecology of tundra swans ● In summer – aquatic vegetation – mannagrass,

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