Tundra Swan
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(New page: '''Common Name:''' Tundra or Whistling Swan<br> '''Scientific Name:''' Cygnus columbianus columbianus '''Size:''' 47-59 inches (120-150 cm); '''Wingspan:''' 67 inches (170 cm) '''Habitat...) |
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The species breeds near shallow pools, lakes and broad slow-flowing rivers with emergent littoral vegetation and pondweeds connected to coastal delta areas in open, moist, low-lying sedge-grass or moss-lichen Arctic tundra. It rarely nests in shrub tundra, and generally avoids forested areas. On migration, the species frequents shallow ponds, lowland and upland lakes, riverine marshes, shallow saline lagoons and sheltered coastal bays and estuaries. During the winter, it inhabits brackish and freshwater marshes, rivers, lakes, ponds and shallow tidal estuarine with adjacent grasslands, flooded pastures or agricultural arable fields. | The species breeds near shallow pools, lakes and broad slow-flowing rivers with emergent littoral vegetation and pondweeds connected to coastal delta areas in open, moist, low-lying sedge-grass or moss-lichen Arctic tundra. It rarely nests in shrub tundra, and generally avoids forested areas. On migration, the species frequents shallow ponds, lowland and upland lakes, riverine marshes, shallow saline lagoons and sheltered coastal bays and estuaries. During the winter, it inhabits brackish and freshwater marshes, rivers, lakes, ponds and shallow tidal estuarine with adjacent grasslands, flooded pastures or agricultural arable fields. | ||
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| - | Status:''' Least Concern. '''Global population:''' 170,000 adult individuals. Its numbers seem to be slowly declining in the west of its range since the late 19th century, coincident with the expansion of human settlement and habitat conversion in the birds' wintering areas; the eastern Whistling Swan populations on the other hand seem to be increasing somewhat, and altogether its numbers seem to have slightly risen in the late 20th century. | + | '''Status:''' Least Concern. '''Global population:''' 170,000 adult individuals. Its numbers seem to be slowly declining in the west of its range since the late 19th century, coincident with the expansion of human settlement and habitat conversion in the birds' wintering areas; the eastern Whistling Swan populations on the other hand seem to be increasing somewhat, and altogether its numbers seem to have slightly risen in the late 20th century. |
'''Diet:''' Submerged and emergent aquatic vegetation as well as grasses and grains. They often “tip up” to reach submerged aquatic vegetation and “dabble” on the water surface. | '''Diet:''' Submerged and emergent aquatic vegetation as well as grasses and grains. They often “tip up” to reach submerged aquatic vegetation and “dabble” on the water surface. | ||
