Tip - How to Keep Cranes Out of Fish Ponds | eHow

The great blue heron, sometimes referred to as the blue crane, is a predatory bird that frequents shallow ponds to catch fish and frogs. In the process, it can transport algae, diseases and even fish eggs to other bodies of water. While this bird can become a nuisance, it is a protected species, so extermination is not an option. There are other...