I took the following photos of Green-winged Teals at the refuge a month ago. They are the smallest among dabbling ducks, much smaller than Mallards. They feed by looking for vegetation in shallow water. The ones seen below live in North America. They differ from their Eurasian counterparts by having a white stripe on their breast. The Eurasian Green-winged Teal have that white stripe along their shoulders.
Lately I haven’t had a chance to do any hiking to take pictures of wildlife, so the following photo comes from a previous outing in early December at the John Heinz National Wildlife Refuge. It shows five Green-winged Teals foraging for food. They were very small dabbler ducks but they also swam very fast as evidenced by the long wake behind them.