The etymology of the phrase “get your ducks in a row” meaning to prepare or get organised is unclear. Some believe it to be a hunting expression, though to this non-participant that seems unlikely. You’re hardly likely to be able to coordinate your prospective targets in a way that makes the job easier. If you’ll forgive the mixed metaphor if would be rather like herding cats!
I think it more likely that it originates from the way in which a mother duck swims with her ducklings lined up behind her, which probably makes paddling easier for the followers in the same way that cyclists draft each other.
Strange the things that come to mind as you’re composing a shot, but the ferri of these parked gondole did remind me of waterfowl crowding the quayside in the hope of a some bread being thrown for them to feed on.