What do you look for this time of year to differentiate an Arctic Tern from the Common or Forster’s here in Idaho?

Sent from my iPhone

> On Sep 30, 2019, at 8:36 AM, Carl Lundblad carl.lundblad@gmail.com [ible] wrote:
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> And some of these Arctic Terns are making it inland, with individuals documented yesterday/Sunday in Nevada and Montana. Take a close look at any late Sterna terns you might encounter in the coming weeks!
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> Good Birding,
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> Carl Lundblad
> Moscow, Idaho
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>> On Sun, Sep 29, 2019 at 11:04 AM LARRY ARNOLD larnold47@cableone.net [ible] wrote:
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>> in case we have a seawatch fan on IBLE, take a peek at these lists posted by Brian Sullivan….. =)
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>> Larry
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>> From: CALBIRDS@yahoogroups.com [mailto:CALBIRDS@yahoogroups.com] On Behalf Of Brian Sullivan heraldpetrel@gmail.com [CALBIRDS]
>> Sent: Saturday, September 28, 2019 10:05 PM
>> To: CALBIRDS
>> Subject: [CALBIRDS] Re: Epic seawatch from Point Pinos, Monterey County–Arctic Tern spectacle
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>> And here’s what happened after I left. I should have stayed!
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>> https://ebird.org/view/checklist/S60197815
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>> On Sat, Sep 28, 2019 at 8:32 PM Brian Sullivan wrote:
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>> Hello birders,
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>> In keeping with the unprecedented appearance of Arctic Terns close to shore this fall, this afternoon during 20-25 knot NW winds we had an amazing seawatch from Point Pinos that included hundreds (conservatively) of Arctic Terns, all three jaegers and skua, 5 shearwater species including 100+ Buller’s and 3 Manx, etc. It really was one of the best afternoons I’ve ever seen out there. My checklist is here for the time I spent this afternoon, but others stayed later and recorded ever more rarities:
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>> https://ebird.org/view/checklist/S60196395
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>> Brian L. Sullivan
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>> Digital Publications Lead
>> Cornell Lab of Ornithology
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