These business cards are made to work with the first three Ecologies games. They have biome abbreviations, possible trophic levels, point totals, and work within the food webs. The only thing they lack is information on "what eats what." If players want to use these cards in their games they'll have to do their own research and agree on "what eats what." There simply wasn't enough room to include this information on the cards. These 54 unique cards feature organisms from all 21 biomes introduced in the "Ecologies" series so far.