05 August, 2012

Ouch..


No birding today as I was laid up with a crippling headache... Just on the left side - weird.

Anyway, I'm mostly posting to say I've spotted a couple of minor screwups and have corrected them. The most important being my inability to read my own writing; at least 40 juvenile Kittiwakes, not at least 40%.. Dear oh dear.. They did make up about 40% of the first couple of hours' birds, but the vast majority later on were adults.

Also, I've not specified what the Torbay Effect is for my non-local readers;

Hope's Nose and Berry Head are peninsulas framing Tor Bay, which is roughly 5x5km. The two promontories are high ground with cliffs of 200' and more, while the back of the Bay is lower more rounded terrain, though still climbing up eventually. It's the only decent shelter for a long way - indeed it was used as the storm shelter for the Royal Navy when they blockaded Napoleon's France 200 years ago - and usually has anchored ships in it in seawatching conditions.

A lot of birds - especially gulls, terns, and skuas [the latter perhaps more likely after the former!], though also powerful fliers like Gannets and divers - will sometimes move in and stay put, or at least rest up a while. When watching at Berry Head, you will often see Kittiwakes moving south come out of the lee of the land, hit the main force of the wind and find they are making no headway. They often either drop to the sea or turn back into the Bay.

The Torbay Effect thus is when there is a large discrepancy between the two sides of the bay, caused by birds either already there moving on, or coming into and not leaving.


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