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Invertebrates: Animals with no backbone.
Lappet: Wattle: a fleshy wrinkled and often brightly coloured fold of skin hanging from the neck or throat of certain birds (chickens and turkeys) or lizards.
Re-introductions: Attempts to establish a native species back into an area where it previously occurred.
Territory: Areas occupied and defended by an animal, a pair of animals or a colony.
Treeline: The upper limits of tree growth in mountains or at high latitudes.