A Crow and More Food Caching

Yesterday, while in the car and sitting at a red light, a crow with a food bit in its beak, dropped down to the sidewalk just ahead of me. It then proceeded to hide the food bit with leaves, carefully placing dry leaves over the item. Suddenly, the crow abandoned the caching efforts, grabbed the food and started to fly away! As the crow took off, another crow appeared, ready to land where the other crow was now leaving. Smart crow! It obviously saw a competitor crow, and took off, knowing that the "secret cache" was no longer secret. :D