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In the breeding section, the egg size is given as 19 by 14 centimetres. This is clearly incorrect; it is larger than the size of the adult bird. But I don't know the correct size because I do not have access to the cited source. Can someone change it to the correct size? Gulumeemee (talk) 03:36, 13 August 2018 (UTC)[reply]
I've changed centimetres to millimetres because A Handbook to the Swallows and Martins of the World, which I can view on Google Books, states that it is 19.0 by 13.3 millimetres. Please change it if this is still incorrect. Gulumeemee (talk) 03:49, 19 August 2018 (UTC)[reply]
Last week I went to the Jamaica Bay Wildlife Refuge, where tree swallows had taken over -- more than I'd ever seen. It seemed like they had claimed nearly every nest box I walked by, making it possible to get some pretty decent photos. As this is already an FA, I figured I'd leave a few here for other editors to add should you see fit.