From the first light of dawn to the blanketing darkness of night, discover the different species that come to life - with GLOW-IN-THE-DARK surprises. A gentle lyrical story threads through the changing day: In the morning's twilight, mule deer nibble grass while a mountain lion stalks nearby. Hummingbirds flit through the air at sunrise. Fireflies sparkle as the day fades to night. Nocturnal creatures begin their business when the sun sets.