A weird phenomenon of mass drownings by (juvenile?) Starlings (Sternus vulgaris) in the UK has been reported (http://www.theguardian.com/environment/2015/nov/25/scientists-unable-to-explain-starling-mass-drownings). These birds do like to do things together (they show allelomimetic behaviour in their famous flights) and they certainly like to bathe. One possibility is that juvenile Starling, lacking experience, become too water-logged by this activity.
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