A very long period of isolation must have been required to produce the differences so manifestly to be observed, but a few forms seem at rare intervals to have immigrated, and this immigration would appear to be kept up to our own day, as shown by the instance of Zosterops lateralis, which is said to have lately made its first appearance, and to have established itself in the country, as well as by the fact of two cuckoos, Charadriiformes 650 (incl. [Please select]
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The Cuckoos' Rest. [Please select]
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Cuckoos and Shrikes in their Relation to Agriculture. [Please select]
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"You don't get round me like that, you cuckoos." [Please select]
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'What silly cuckoos we all are,' he said. [Please select]
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Some species are at all times poor nest-builders, as the cuckoos and the pigeons. [Please select]
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Cuckoos are common birds, but are more often heard than seen. [Please select]
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* * * * * {14} THE CUCKOO BEES These cuckoos live at the expense of their hosts. [Please select]
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The only short-tongued bees which have cuckoos of similar structure are the species of _Halictus_ (pl.) [Please select]
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Unlike as these cuckoos are to their hosts in their brilliant metallic coloration, etc. [Please select]
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The underground species are more subject to the attacks of cuckoos than the carder bees. [Please select]
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