The annual BigPicture: Natural World Photography Competition encourages photographers from around the world to contribute their work to this photo competition that will both celebrate and illustrate the rich diversity of life on Earth and inspire action to protect and conserve it through the power of imagery. The winning images are exhibited at one of the most prestigious science institutions in the world in San Francisco, California, USA.
The BigPicture Photo Competition has the following categories: Art of Nature | Aquatic Life | Winged Life | Landscapes, Waterscapes, and Flora | Terrestrial Wildlife | Human/Nature | Photo Story: Out of the Ordinary.
The Grand Prize winner will receive $5,000 in cash.
The first place winners of the seven categories will each receive $1,000 in cash.
BigPicture is open to all photography enthusiasts and professionals alike worldwide to compete for a chance to win the $5,000 grand prize.
Copyrights & Usage Rights:
Entrants retain ownership and all other rights to submitted photographs subject to the following: By entering the Competition, each Entrant grants to the Academy a non-exclusive, irrevocable license to reproduce, publish, and display submitted images directly relating to the Competition in all media throughout the world in perpetuity. This includes but is not limited to use in the context of the Academy website and social media sites, the exhibition of winning images* at the Academy, and and and all promotional and marketing materials regarding the Competition and Exhibition. In other circumstances, commercial opportunities may exist for awarded photographers to benefit from the use of their images, such as print sales or merchandise. Where such a commercial benefit is likely to arise, permission will be sought in advance and terms and conditions will be agreed upon with the photographer.
More information here