The Great Annual Parrot Hunt. Brownsville in the afternoon. The sun sets. A hundred red-crowned parrots fly in to roost. In the fast fading light, try to pick out any other kinds of parrots from the swirling squawking mass. Fifteen minutes of light left. Go. 
Red-crowned.
Lilac-crowned.
Yellow-headed.
White-fronted.
Red-lored
Time’s up! Lights out.
Red-crowned. Lilac-crowned. Yellow-headed. White-fronted. Red-lored Time’s up! Lights out.