I don't know what this means. I have darts that are very secretive and I see them all the time. I have Black Eyed Leaf Frogs that are fiercely nocturnal, yet I see and hear them every night for hours. I have Chorus Frogs and I don't see them any more than my other frogs. They just have different schedules and certain active periods. Most have several periods of activity throughout the day, or night. No species will conform to your schedule or be visible at the moment that you want to see them.