Much has changed in nature, stock, and professional photography in general over the last decade and many working photographers are dealing with those changes daily.
When I look at today’s markets for nature photography I see many huge market changes and still see some markets that remain the same. Calendars for example still need beautiful landscape imagery as well as specialty subjects to fill their calendars like: Cats, Dogs, Love, and other themed calendar titles.
Advertising has changed and how advertisers license images has changed as well with Microstock models and the decline in print and the growth in online advertising.
How photographers deal with these changes and find areas of the market where they can shine will vary from one to the other. With the increasing cost of travel and tight markets for nature images, planning month long road trips across the USA gets a lot more scrutiny than in years past.