Dwight Kuhn is sole photographer for more than 140 childrens books on nature and biology. Thousands of Dwight's photos have appeared in major magazines and textbooks. Dwight was one of ten photographers featured in the book Wildlife Photography: The Art and Technique of Ten Masters by Susan Rayfield.
This book was really cool, it would show part of an animal close up and have you guess what farm animal they were talking about after giving you some clues. This would be a good book to have in my classroom library for students that are interested in learning about the different farm animals and their different features that are talked about throughout this book.
I'm fond of the "Look Once, Look Again" science series. Readers are shown a series of close-up mystery photographs, along with clues to identify the objects. I used this with my pre-K classes for the farm unit.