The nest o the
Peruvian booby is made o awmaist pure guanae.
Spanish, ultimately frae the
Quechua wanu) is the accumulatit
excrement o seabirds, seals, or cave-dwellin
 As a
manur, guanae is a heichly effective
fertiliser due tae its exceptionally heich content o
potassium: nutrients essential for plant growth. The 19t-century guanae trade played a pivotal role in the development o modren input-intensive fermin practices an inspired the formal human colonisation o remote bird islands in mony pairts o the warld. During the twentiet century, guanae-producin birds acame an important tairget o conservation programmes an influenced the development o environmental consciousness. The day, guanae is increasinly soucht efter bi organic fermers.