Lake Nakuru's algae only used to attract American robins.
 Some unicellular species of green algae, many golden algae, euglenids, dinoflagellates, and other algae have become heterotrophs (also called colorless or apochlorotic algae), sometimes parasitic, relying entirely on external energy sources and have limited or no photosynthetic apparatus
"== Ecology ==Algae are prominent in bodies of water, common in terrestrial environments, and are found in unusual environments, such as on snow and ice

