"Bird behaviour: Rather than swimming around, it likes to walk around on the water grass by the water's edge searching for food. It's not a 'rail' bird, but it's very cautious."
I don't know what a rail bird is I had to look that up.
But that was the translation for クイナ類
But yea...that's the basic first-impression translation I got
I never quite know how to feel when I come across things in Japanese that I never learned about in English. Looking at the English surely doesn't help. In the case of animals I usually resort to pictures.