Guide to the Birds of Costa Rica (Helm Field Guides)
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Life of the Hummingbird
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The Minds of Birds (Louise Lindsey Merrick Natural Environment Series , No 23)
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Naturalist In Costa Rica
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A Naturalist on a Tropical Farm
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Life of the Woodpecker
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A Bird Watcher's Adventures in Tropical America
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Birds of Tropical America (Corrie Herring Hooks Series)
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A Naturalist in Costa Rica
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The Imperative Call: A Naturalist's Quest in Temperate and Tropical America
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Orioles, Blackbirds, and Their Kin: A Natural History
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A Naturalist amid Tropical Splendor
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The Origins of Nature's Beauty
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Antbirds and Ovenbirds: Their Lives and Homes (Corrie Herring Hooks Series)
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Trogons, Laughing Falcons, and Other Neotropical Birds (Louise Lindsey Merrick Natural Environment Series)
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Helpers at Birds' Nests: A Worldwide Survey of Cooperative Breeding and Related Behavior
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Harmony and Conflict in the Living World
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Aves De Costa Rica
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Life of the Tanager (Comstock Book)
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Life of the Pigeon
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Birds Asleep (The Corrie Herring Hooks, No 14)
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Life Ascending
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Life of the Flycatcher (Animal Natural History Series, 3)
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Parent Birds and Their Young (The Corrie Herring Hooks Series ; No. 2)
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Nature Through Tropical Windows
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Moral Foundations: An Introduction to Ethics
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Early Views of Alexander F. Skutch. Selections from his Nature Diaries, Philosophical Notebooks & Several Other Manuscripts, 1928-1946: Vol. 3 - A Philosopher in Costa Rica
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The Golden Core of Religion
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Tales of a naturalist
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Armonizaci�n: Aportes filos�ficos para la biolog�a y la �tica ambiental: una antolog�a
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