Japanese bird watching

When Ted lived in Japan he suffered from a lack of books in general and a lack of field guides to Japanese birds in particular. Maybe things have changed, but way back in 2004 it was nearly impossible to obtain such a thing in English at a reasonable price (Amazon was happy to sell one for a few hundred dollars, if memory serves me). So while visiting we were struck by this interpretive sign dangling off a rope in a Zen moss garden. It's a picture of a picture and I'm not sure what it says -- my Japanese is that bad.