• Must have an exclusive or near exclusive diet
• Cannot eat frogs
• Cannot be a creature that frogs eat (flies, worms etc)
• Cannot eat flies or fly-like bugs or things that frogs eat (worms, slugs etc)
• Must be a natural diet not like 'Dogs eat dogfood' or 'Mice eat cheese'

I thought it'd be quite easy to think of lots but having done a few I'm at a loss now
Here's a list of ones I've done so far or have planned:

• Done:
  • Duck - pondweed
  • Panda - bamboo
  • koala - gum leaves
  • Starfish - shellfish
  • Mole - worms
  • Aardvark - ants/termites
  • Macaw fruit & seeds
  • Whale - krill
  • Ladybird (ladybug) - aphids
  • Marine Iguana - algae
  • Squirrel - nuts
  • Puffin - sand eels
  • Vampire bat - blood
  • Stag Beetle - nothing!
  • Penguin - fish
• To do:
  • Polar Bear - seals
  • Hummingbird - nectar

I've started working on the illustrations for a new childrens' book at the end of December, and work continues apace. But even though it's early days,  I'm beginning to struggle with the subject matter.

The problem is I need to draw a fair few different animals but they must meet a series of quite stringent criteria:

• Must have an exclusive or near exclusive diet
• Cannot eat frogs
• Cannot be a creature that frogs eat (flies, worms etc)
• Cannot eat flies or fly-like bugs or things that frogs eat (worms, slugs etc)
• Must be a natural diet not like 'Dogs eat dogfood' or 'Mice eat cheese'
  
  I thought it'd be quite easy to think of lots but having done a few I'm at a loss now.