Basic Guidelines: In the strictest sense, nature photography should not include "hand of man elements". Please refrain from images with buildings or human made structures like roads, fences, walls. Pets are not permitted. Captive subjects in zoos, arboretums, or aquariums are permitted, but must be declared, and must focus on the subject, not the captivity. Images with obvious human made elements will likely be deleted from the thread, with an explanation to the photographer. Guidelines are based on PSA rules governing Nature photography which also cover the Nature Forum. Keep your image at/under 1000 pixels on the long axis for in-line viewing. Note that this includes photos hosted off-site at Flicker, Photobucket, your own site, etc Each member please post no more than just one image to this weekly thread per week. If the information is available, many members appreciate information on your approach to making the image and the names, both common and scientific, of the subject(s). However, while encouraged, these are not required as a component of your contributions. Bison getting interested, Yellowstone National Park, Wyoming, October 2016. This is an early effort with the Tamron 150-600, and illustrates very well my frustration with this lens. Note the slightly OOF grasses in the foreground that, rather than going soft or fuzzy, come out as a double image. Was not an issue at 16Mp with the D5100, but very distracting at 24Mp on the D7100.