The current (June 2016) issue of the Australian BirdLife magazine has a great article 'Same same but different' by Danny Rogers and Sean Dooley. It provides 'some helpful methods to identify that most perplexing bird group, the small terns'.
The article includes a hyper-useful table cross-tabulating the species by diverse points of identification.
The article coincides with the release of the BirdLife Australia tern identification guide
My Tern, downloadable gratis from
http://birdlife.org.au/projects/shorebirds-2020/counter-resources
Highly recommended - David
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David McDonald
1004 Norton Road
Wamboin NSW 2620
Australia
T: (02) 6238 3706
M: 0416 231 890
F: (02) 9475 4274
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