It’s just after 9 a.m. and the air is thick, even on the water.

Jason Evans is aboard an aging pontoon boat, scanning the banks for drainage pipes. He closes in on a 12-incher coated with barnacles, then hauls out his GPS device.

“Go ahead and mark this as No. 1,” he tells his two research assistants from Stetson University.

A pileated woodpecker thumps on a palm while the GPS plots the pipe’s location along the Grand Canal in Satellite Beach. Evans and his crew bake in the sun as they wait.

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