Tundra swan online presentation
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The Tundra Swan is a large white bird that breeds in Alaska and Canada and winters along saltwater bays, estuaries, and marshy lakes. Males and females are similar in appearance with white plumage and yellow patches below the eyes. They feed on aquatic plants, mollusks, and grains in large flocks, migrating annually. As the largest waterfowl in North America, Tundra Swans face threats from hunting and predators, but defend themselves and their offspring aggressively if needed. They mate for life and raise their young cooperatively in the same breeding grounds each year. Current research studies their migration patterns and how weather and water levels impact stopover sites and food availability.
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Tundra swan online presentation
- 2. Photo by: Maga- chan/Wikipedia Brief Description • very little visual difference between males and females • all white plumage • distinctive round or square yellow patches below and in front of either eye • very large and have heavy bodies that weigh between thirteen and fourteen pounds • wingspan of six to seven feet
- 3. Photo from blog.seeingbird s.com Habitat Type and Location • Winter on salt water bays and estuaries • marshy lakes, rivers, ponds, streams, and flooded fields • Breeding occurs in Alaska and Canada along river deltas
- 4. Photo from chickadeephoto art.com Diet and Feeding Behavior • Tubers and rots of aquatic plants • Mollusks and grains • Rest in places with large amounts of food to feed entire flock • Will go head to head over clams with other birds
- 5. Map by Cornell Lab of Ornithology Range Data by NatureServe Migration Patterns
- 6. Photo from http://my.kwic.com/~ pagodavista/schoolh ouse/species/birds/h unt.htm Natural Enemies • Hunting and humans are their biggest natural enemy • Other animals include: - foxes, bears, and wolves - Eagles, mountain lions, and raccoons
- 7. Photo by Darren Naish Defensive Behavior • Only aggressive when defending young and breeding grounds • Tackles and tramples intruders • Grab tails of other birds during aerial defense • Swans take flight before bigger animals can reach the nest -helps keep the nest hidden
- 8. Photo from Stockpix.com Social Behavior • Swans travel in large flocks that forage and roost together • Social except when mating -individual mating pairs have their own breeding territory that they guard • Flocks breed in same area as one another
- 9. Photo by Ed Oliveras • Seen as nonaggressive and nondestructive • Will share feeding and resting grounds with other species
- 10. Photo by: US Fish and Wildlife Service Reproductive Behavior and Life Cycle: • 3-5 eggs are laid • Females incubate the eggs for 32-34 days • Cygnets brooded by both parents until fall migration
- 11. Photo by: John Cancalos • Both parents take an active role in defending Cygnets and nest cites • Cygnets are cared for even after they’re capable of swimming and feeding themselves
- 12. Photo By: Mike – Jan 2014 RoadsEndNatur alist.com • male and female courtship begins in late winter and continues into the spring • Breeding pairs mate for life
- 13. Photo from: IUCN Red List Conservation Status: Least Concern
- 14. Photo by Claude King Current Research Being studied: -The underuse of stopover sites -migratory behaviors -migratory patterns -if ice cover effected spring and fall migrations
- 15. Photo by D. Montgomery (USFWS) • Weather change leads to higher water levels • Higher water levels leads to underuse of stopover cites -swans can’t reach underwater plants
- 16. The End A presentation by: Megan Nieters-Blair