The document assigns colors to different groups of animals to represent their evolution: orange for fish, blue for amphibians, green for reptiles, green for birds, and yellow for mammals.

1. I COLORI DELL'EVOLUZIONE

2. PESCI................IN ARANCIONE PESCI

3. ANFIBI.......................IN BLU

4. RETTILI.............IN VERDE

5. UCCELLI.........IN VERDE

6. MAMMIFERI.................IN GIALLO