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Subject:

RFI - nocturnal migration RB Gulls?

From:

Andy Martin

Reply-To:

Andy Martin

Date:

Fri, 2 Mar 2007 11:26:03 -0500

With light ESE winds forecast for night of Feb 28/early morning Mar 1, I 
put out my recording gear for the 1st time this year to see if I could 
detect any migrants.

For the most part calls were few and far between, 2 Killdeer, a distant 
flock of Tundra Swans, a small group of Canadian Geese, and a Fish Crow 
(at 12:55 AM - weird).

However, I also detected a number of calls from Ring-billed Gulls.  
First at 12:12 AM, a few birds passed fairly close to my house.  I 
detected 8-9 additional(but more distant) calls through 4 AM.

Anybody know if RB Gulls migrate at night, as well as day?  I searched 
the internet and came up with nothing regarding diurnal vs nocturnal 
movements.  Cornell's BNA Online identifies late Feb as start of 
migration for RB Gulls.

Thanks for any help.

Andy Martin
Gaithersburg, Mont Co