Magnitude of numbers of stranded common bottlenose dolphins (<i>Tursiops truncatus</i>) above the upper baseline limit (1990–2009) in the northern Gulf of Mexico during the ongoing unusual mortality event (January 2010-June 2013).

<p>From west to east; A) Texas, B) Western Louisiana C) Barataria Bay, Louisiana, D) Northern Louisiana, E) Mississippi, and F) Alabama, G) Florida Panhandle, and H) Western Florida. The solid box marked ‘Pre-spill’ represents time before the <i>Deepwater Horizon</i> oil spill in the northern Gulf of Mexico.