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Peregrine subspecies? 游隼亞種 ?

Hi Geoff

I think your larger peregrine is the migrant race calidus, which is known to be larger and paler then the resident peregrinator.  Paer birds also have a tendency to look larger which probaby enhances the actual size difference.

I've never seen both races together, and I certainly envy you the sighting!

Cheers
Mike K
Mike KilburnVice Chairman, HKBWSChairman, Conservation Committee

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