https://www.gardenvisit.com/blog/swan-upping-2014-could-the-swans-and-the-uppers-be-attracted-back-to-the-thames-in-central-london/ Gardenvisit.com Wed, 23 Jul 2014 04:18:40 +0000 hourly 1 https://wordpress.org/?v=6.5.8 https://www.gardenvisit.com/blog/swan-upping-2014-could-the-swans-and-the-uppers-be-attracted-back-to-the-thames-in-central-london/#comment-6039 Wed, 23 Jul 2014 04:18:40 +0000 http://www.gardenvisit.com/blog/?p=10679#comment-6039 It seems you have to be careful when constructing theories about swans![ http://en.wikipedia.org/wiki/Black_swan_theory ] If the white swans become extinct we may have consider a cross breeding program with the Florida grey swan to see if we can eventually get a white one? Perhaps you could start with the black swans in Devon?

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