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15 Australian Birds (Episode 6)

10,000 Birds

This means its parents did not abandon the incomplete nest, as they do when a potential predator is nearby: “Grey Fantails desert incomplete nests in response to the attention of predators [which we tested] by placing a mounted Pied Currawong (Strepera graculina), a common nest predator, near fantail nests that were under construction.”

Australia 147
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Parental Investment Theory

10,000 Birds

Both Elk and songbirds have the same basic method of inseminating eggs, which is one of the steps in reproduction (but not by any means the first!), Songbirds grow the offspring internally for only a very short while, and then pop out an egg, which is then cared for over a significant period of time until it hatches.

Mammals 201