However, I can tell you that yes, there are many pictures of mushrooms growing in horse manure! This is a common sight as many types of mushrooms, particularly those in the *Coprinus* genus (inky caps), thrive in this nutrient-rich environment.
You can find these pictures by searching online using keywords like:
* Mushrooms growing in horse manure
* Coprinus mushrooms in horse manure
* Horse manure fungi
You'll likely find images on websites like Google Images, Flickr, or specialized mushroom photography websites.
Keep in mind that while some mushrooms are edible, many are poisonous. Never consume a wild mushroom unless you are 100% certain of its identification by an expert.