All images used in PSA Nature Division competitions and PSA-recognized Exhibitions must meet the PSA Nature Definition of Nature Photography as follows:
Nature photography is restricted to the use of the photographic process to depict observations from all branches of natural history, except anthropology and archeology, in such a fashion that a well informed person will be able to identify the subject material and to certify as to its honest presentation. The story telling value of a photograph must be weighed more than the pictorial quality while maintaining high technical quality. Human elements shall not be present, except where those human elements enhance the nature story. The presence of scientific bands, scientific tags or radio collars on wild animals is permissible. Photographs of artificially produced hybrid plants or animals, mounted specimens, or obviously set arrangements, are ineligible, as is any form of manipulation that alters the truth of the photographic statement. No techniques that add to, relocate, replace, or remove pictorial elements except by cropping are permitted. Techniques that enhance the presentation of the photograph without changing the nature story or the pictorial content are permitted. All adjustments must appear natural. Color images may be converted to grayscale monochrome. Infrared images are not allowed.
All images used in PSA Nature Division competitions and PSA-recognized Exhibitions for Wildlife images must meet the above definition as well as the PSA Definition for Nature Wildlife Photography as follows:
Authentic wildlife is defined as one or more organisms living free and unrestrained in a natural or adopted habitat. Therefore, landscapes, photographs of zoo or game farm animals, or any living subject taken under controlled conditions are not eligible for Wildlife competitions. Authentic wildlife is not limited to uncontrolled zoological subjects. Land and marine botanical subjects in the wild (including fungi and algae) are also eligible subjects, as are animal carcasses.
Note: Wildlife images may be entered in Open Sections of Nature International Exhibitions. Images that do not have living organisms as the primary subject matter or images taken with the subjects in controlled conditions, such as zoos, game farms, botanical gardens or setups may be entered in Open Sections, but may not be entered in Wildlife Sections. Insects, marine subjects, and botanical subjects taken in the field are suitable wildlife subjects. Wildlife subjects are not limited to animals or birds.