Tim McSweeney was nearly knocked from his bike on the path beside Crosshaven Estuary, by a stag in a rush to keep up his cold acclimatisation.  Bernard Lynch was involved with the RNLI some years back in rescuing a stag stuck in the mud around the same area.  It seems they cross there regularly.

Tim got this quick shot on his phone, once he recovered from the shock:

Stag swimming in Crosshaven Estuary – February 2013