DreamsTime and 123's free photo gallery both contain wide selections of images and pictures of blue herons available for download without rights or royalties attached. These images differ from stock photography in that there is no charge attached to their use, so they can be printed, incorporate into other work or downloaded without payment.
Herons are iconic fishing birds and make good additions to many graphic design projects. Free images free them up for use in fliers, circulars, private book jacket designs and many other visual design projects that can benefit from the inclusion of high-quality photography but do not have the budget for professional services.
DreamsTime maintains a huge database of free and licensed images. Searchers can filter images by whether or not they are licensed and can hunt for unlicensed heron images for use in their own projects or just for personal enjoyment without having to sift through royalty-obligated images.
123RF maintains a similar gallery with many of the same search parameters. Between the two sites and other free image galleries, Internet users can find images of herons in many poses and rendered in many mediums from stained glass to oil paints and photography. This grants huge creative license to those looking to use the images for themselves.