Great Moments In Science - With Dr Karl Kruszelnicki
The colour of bird poo
- Autor: Vários
- Narrador: Vários
- Editora: Podcast
- Duração: 0:06:34
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Sinopse
Bird poo is usually coloured white—because of the way birds excrete excess nitrogen. But the poo can sometimes be a different colour—because of their diet. Creatures have evolved three main ways of getting rid of excess nitrogen.