Just took a look at the Antarctic Tern Opus account and have some questions about the ID of the lead photo. I could be wrong, but it doesn't look quite right with the bold dark carpal bar and dark outer webs to the outer primaries. Also my understanding is that this species would be rare in South Africa in December; they are expected April - September.
Could it be a Common Tern?
Could it be a Common Tern?
