THOMAS & FRIENDS™ DUCK ENGINE with Moving Eyes - HO Scale. Duck is a cheerful busy engine. He s only a small tank engine but he ll take no nonsense from larger engines who try to order him about. Duck s real name is Montague. Duck is based on a 0-6-0 pannier tank of the 5700 class. Bachmann carefully reproduces your favorite Thomas & Friends™ characters in HO scale. All locomotives feature realistic faces with moving eyes operating HO scale electric drive mechanisms highly detailed plastic body shells all-metal wheels and international-style hook-and-loop couplers.