Fish hooks and line can be used to capture birds or other critters easily enough even if you are in an area without much water. Once set and baited they do all the work for you. Pop out a few snares and you should snag a meal eventually.

The so called experts say that you can go weeks without food, but I bet thats easier said than done. For the small amount of space a few hooks and line will take up in a kit what's the harm?