Robert Elgas - Bücher - alle Infos bei Yasni.de

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Helm Dictionary of Scientific Bird Names - James A. Jobling - Google...

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Many scientific bird names describe a bird's habits, habitat,distribution or a plumage feature, while others are named after theirdiscoverers or in honour of...

Swans: Their Biology and Natural History - Paul Johnsgard - Google...

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The seven species of swans are an easily and universally recognized group of waterfowl, which have historically played important roles in the folklore, myths...

Birds in Our Lives - United States Sport Fisheries and Wildlife...

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Unfortunately, since both Robert Elgas and I conduct our wildlife work as a hobby, we have responsibilities to our regular work. For that reason, we had to leave ...

The North American Swans: Their Biology and Conservation - Paul...

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Among birds, swans are relatively long-lived species and are also among the most strongly monogamous, having prolonged pair and family bonds that strongly...

The North American Swans: Their Biology and Conservationbooks.google.com › books

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... period of 30 to 32 days is typical; Banko and Mackay (1964) likewise estimated the tundra swan's average incubation to last about 32 days. Robert Elgas ...

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Bücher Robert Elgas

Helm Dictionary of Scientific Bird Names - James A. Jobling - Google...

Swans: Their Biology and Natural History - Paul Johnsgard - Google...

Birds in Our Lives - United States Sport Fisheries and Wildlife...

The North American Swans: Their Biology and Conservation - Paul...

The North American Swans: Their Biology and Conservationbooks.google.com › books