Where could I send my pictures to (magazines) if I want to be a nature photographer?!?!?! HELP!!?

So, I want to be a nature photographer and everyone I show my photos to they tell me I should send them to a nature magazine or outdoors. I would like to but I just do not know what ones to send them too. I am making a Flickr account tomorrow for some of my pictures. Thanks and check back tomorrow afternoon and I will "edit' this and put a link to flickr if you want to see. !! Thanks in advance. !!