Saturday, December 15, 2012

Dec 14, 2012: Trumpeter Swans

Trumpeter Swans, 12/13/12 (Wolf Oesterreich)

After completing 2 figure-8s around the main lakes and the Upland Trail loop, I started on the 3rd figure-8 (before 1130). Much to my surprise, there were 9 adult Trumpeter Swans on the south lake. The photograph shows just 3 of them. The rust color on the top of the head of the one on the left is from contact with ferrous minerals in the soils of wetland bottoms during feeding. Males are typically larger, but other than that, the sexes are identical. Trumpeter Swans have been successfully reintroduced to Iowa.

Wolf. Oesterreich
13 Dec 12

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