1. What colour is penguin guano?. Issue 5 (23rd June 2017) Authors: Rees, W.G.; Brown, J.A.; Fretwell, P.T.; Trathan, P.N. Journal: Antarctic science Issue: Volume 29:Issue 5(2017) Page Start: 417 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗