Crayfish are a favorite food of Hooded Mergansers, but they're not easily consumed. A certain amount of preparation is required. See the photos below to see how this hoodie prepares his meal.
Here's a Hooded Merganser with a freshly-caught crayfish:

The crayfish is still grasping a twig, in a futile attempt to prevent being carried off:

Now ... What do do?

The plan of attack is first to get the pincers out of the way ...

Get a good grip on the pincer:

Give it a little shake:

Give it bigger shake:

Then a violent shake ... and the pincer begins to break free from the body:

Success! Another pincer bites the dust:

Now on to the legs ... Try that shaking approach again:

Two legs gone:

Another leg or two break loose:

Once the appendages are removed, it's meal time! One swallow is all it takes:
