Imagine a peaceful pond in the Frisian wetlands. Ducks paddle around, completely relaxed. Then a small dog appears, playing along the shore. The ducks get curious and follow it. Before they know it, they’re swimming down a curved tunnel of netting, and there’s no way back.
Welcome to the eendenkooi, or duck decoy. It’s one of the cleverest hunting methods ever invented, and Frisians were masters at it.
These weren’t simple traps. They were elaborate water systems designed to exploit duck psychology. And they worked so well that a single decoy could catch thousands of ducks in a season.
Here’s how it worked. You’d dig a pond in a quiet spot, surrounded by trees for shelter. Then you’d add several curved channels called “pipes” that branched off the main pond. These pipes got narrower as they went, covered with netting that arched overhead.
The genius was in the curves. Ducks that swam into a pipe couldn’t see the end. They couldn’t see the trap. They just saw what looked like an interesting little waterway.
That’s where the dog came in. Kooikerhondjes, small reddish-brown dogs, were specially bred for this job. They’d appear at the entrance to a pipe, playing and jumping. Ducks are naturally curious about movement, so they’d swim closer to investigate.
The dog would move a bit further down the pipe. The ducks would follow. The dog would move again. The ducks would keep following.
By the time the ducks realized something was wrong, they were too far down the narrowing tunnel. The curved design meant they couldn’t see an escape route behind them. They’d panic and swim forward, right into a catching area at the end.
The hunter would scoop them out with a long-handled net. Dinner served.
Friesland had dozens of these decoys scattered across its wetlands. Some date back to the Middle Ages. They provided fresh meat and valuable feathers for centuries. In winter, when regular hunting was nearly impossible, decoys kept working.
The word “eendenkooi” literally means “duck cage” in Dutch. In Frisian, they might be called “ienekôge” or similar, though the Dutch term dominated since these were commercial operations with standardized terminology.
Running a decoy took serious skill. You had to maintain the pond just right. Too much vegetation and ducks wouldn’t land. Too little and they’d feel exposed. The pipes needed constant repair. The dog needed perfect training. One wrong move and the whole flock would scatter.
Professional decoy men passed their knowledge down through families. They knew exactly when to work each pipe based on wind direction, time of day, and season. They could predict duck behavior like modern hunters predict nothing.
At their peak in the 1800s, Dutch decoys (including Frisian ones) caught hundreds of thousands of ducks annually. Some individual decoys pulled in over 10,000 birds per season.
Then came modern hunting methods. Guns got better. Regulations got stricter. The decoy business collapsed in the early 1900s. Most fell into disrepair.
But here’s the beautiful twist. Many old decoys got converted into nature reserves. The same peaceful ponds that once trapped ducks now protect them. The curved pipes still exist, but now they’re sanctuaries where birds can hide from predators.
A few working decoys still operate in the Netherlands for scientific bird banding. Researchers use the same old techniques to catch ducks, band them, collect data, and release them. The dogs still do their job, but now they’re helping conservation instead of hunting.
You can visit some preserved decoys in Friesland today. They’re quiet, mysterious places where you can walk through a piece of clever history. The ponds sit peaceful. The pipes curve away into the trees. And if you’re lucky, you might see ducks paddling around, completely unaware they’re swimming through an ancient trap that their ancestors fell for by the thousands.
It’s weird to think that Frisians spent centuries perfecting the art of tricking ducks with trained dogs. But that’s exactly the kind of practical ingenuity that kept people fed in a waterlogged province where regular hunting methods didn’t work.
The eendenkooi might be history now, but it shows how Frisians looked at their wet landscape and saw opportunity instead of obstacles. They didn’t fight the water. They used it. And they got really, really good at it.
