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Talkback: Wasps and cuckoo bees

oldchippyoldchippy Posts: 244
Hello Richard,I saw my first swift today here in

Ewell, it's the first since 31th July last year.How do they know when it's the end of July and time to leave.



Oldchippy.

Posts

  • WelshonionWelshonion Posts: 3,114

    They leave as soon as their young are fledged.  They never land except to breed.

  • The swifts finally arrived on 11th May, at least a week later than usual. Pah. Fairweather travellers.
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