Ingo Arndt / Male Vogelkop bowerbird (Amblyornis inornatus) constructing bower roof. Arfak Mountains, West Papua, Indonesia.
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Mark Hamblin / RF - Siskin (Carduelis spinus) male perched on birch, UK Scotland, UK. May. (This image may be licensed either as rights managed or royalty free.)
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Mark Hamblin / RF - Siskin (Carduelis spinus) male displaying aggressively Scotland, UK. May. (This image may be licensed either as rights managed or royalty free.)