Like trading an Arctic bird for sausage?
A Tern for the Wurst.
Well done - reminds me of a joke...
While flying some marijuana into the US, some smugglers thought they were being targeted by a military plane. They dumped the load over a beach. Once in the clear they landed on the beach to try to recover their stash, and found a huge number of birds. In their search they found no tern un-stoned.
Tom
Hee hee. That's funny.