The importance of guano birds to the Inca Empire and the first conservation measures implemented by humans - Rodrigues - 2021 - Ibis - Wiley Online Library
Ballestas Islands—where bird poop reigns supreme | Where to next?
The secret life of bird droppings” | Nature's Crusaders
Amazon.com : Down to Earth All Natural Seabird Guano Fertilizer Mix 0-11-0, 5 lb : Patio, Lawn & Garden
Banking on Bird Shit | Hakai Magazine
Where the Seabird Guano Goes | Blog | Nature | PBS
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This 1856 law makes it legal to seize islands for America if they have lots of bird crap - Vox
Seabird Guano 0-11-0 – Down To Earth Fertilizer
What Is Guano? - WorldAtlas
:no_upscale()/cdn.vox-cdn.com/uploads/chorus_image/image/36319168/bird.0.jpg "This 1856 law makes it legal to seize islands for America if they have lots of bird crap - Vox")
This 1856 law makes it legal to seize islands for America if they have lots of bird crap - Vox
What a load of guano: 5 facts you didn't know about bird poop | National Museum of American History
There's something cool about Arctic bird poop
How bird poop helps cool the Arctic | Science | AAAS
Seabird Guano Both Warms the Earth and Cools It - Truthdig
seabird guano | Penguins International
Seabird Poop Is a Force of Nature | Discover Magazine
Are We Entering a New Golden Age of Guano? - JSTOR Daily
Bird poop brings 3.8 million metric tons of nitrogen out of the sea each year | Science | AAAS
Pelicans leave smelly proof they're thriving again
