Most members just want to enjoy photographing nature and wildlife but there is a precise definition of what is Nature or Wildlife photography (they do differ) and what you can do to an image in post processing to enter it in a competition under either heading.
If you are entering competitions in either genre then these definitions are necessary. These are set out by FIAP/PSA HERE and endorsed by Dublin Camera Club for any of its competitions under either category. An easy to understand interpretation is on this LINK