Sentence:  Out of this background of hunting and fishing , it was only natural that Roy first painted subjects he knew best : hunters in the field , fishermen in the stream , <WSD>ducks</WSD> and geese on the wing - almost always against a vast backdrop of weather landscape . 
Meaning of the word marked with <WSD> tags:  small wild or domesticated web-footed broad-billed swimming bird usually having a depressed body and short legs