If you work in advertising, you know what it's like when a bad client comes along. Thankfully, the staff of Coplex (formerly Ciplex) have been observing a variety of clients in their native habitats for some time now, and they've come up with a handy field guide on how to approach this temperamental species.

The guide identifies 15 specimens most agencies have likely come across, but it doesn't stop at just telling you what you already know about them. Special 'care and feeding' instructions are provided, making it easier to tame these savage beasts the next time you happen upon them in the wild. It's worth noting that the word 'no' is a fairly effective command, if in doubt.

Consult the Field Guide to the Wonderful World of Clients for yourself below, and be prepared the next time Mr. I Need This done Yesterday walks through your door.

More info: Coplex (h/t: DigitalSynopsis)