Snow Goose (Chen caerulescens)...we checked in Tom's Birding Field Guide and later, in The Sibley Guide to Birds, Second Edition.
There was a second Snow Goose with another flock of Canada Geese in another pond.
We have seen huge flocks of Snow Geese in October at Bombay Hook National Wildlife Refuge in Delaware but these were the first two we have seen at the fish hatchery at St. Mary's. The geese only pass through Ohio during migration.
We also saw one American Coot (Gallinula galeata). In a few weeks, we will be seeing big flocks of them.