Choked on sticklebacks

Are you asking what this means / what certain elements of it means / whether it makes sense...?

Sticklebacks are small fish that live in the streams and rivers of the UK. I guess that some ducks may try and eat so many of them that they choke, especially as the fish have a series of small spines on their backs. As far as the idea of 'stuffed' is concerned, I think it means the ducks' stomachs are full up, not 'stuffed' as in soft toys (which is what I first read it as).

Sticklebacks are group of fish species that have spines on their backs, making them difficult to swallow.

Taxidermists stuff dead animals and birds for display in museums or in the homes of hunters that killed them.

A duck can die from choking.

shininggirlStuffed ducks that had choked on sticklebacks.

Great line. It sounds like a drum riff. It's from The Beasts of Clawstone Castle, by the late Eva Ibbotson. I found more than one version online.