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'Pigwidgeon' is grey in colour.
Pigwidgeon, and he is "given" to Ron by Sirius Black in POA
Ron's younger sister, Ginny, named his owl Pigwidgeon. However, Ron refers to him as "Pig".
Harry's owl is called Hedwig, Ron's owl is called Pigwidgeon!
Draco Malfoy had an Eagle owl, it's name was never mentioned.