The year 2011 was for World Migratory Bird Day absolute record breaker thanks to an amazing 204 registered events in 64 countries worldwide. It was celebrated on 14th and 15th May 2011 and focused on conversion of natural areas into agricultural land, the construction of buildings, roads and dams, or deforestation, which are just some examples for the human use of land, also known as land use, while migratory bird populations are particularly sensitive to these changes.