Using head lamps helps makes spider webs stand out when looking for the arachnids.

Owen illuminates a spider web with a head lamp Thursday night.

A tetragnatha spider glows from a head lamp Thursday night. The arachnid built its web horizontally near water to catch hatching aquatic insects.

Field trip participants identify insects while ankle deep in Ten Mile Creek Thursday night.

Owen points to a caddis larvae Thursday night.

With tweezers, Owen points to a stonefly Thursday night.

Sara Owen, Ecologist for Montana Natural Heritage Program, right, points out aquatic insects gathered on rocks from Ten Mile Creek Thursday ni…

Judge Mike McMahon declares Trude not guilty of tampering with evidence Wednesday at the Lewis and Clark County Courthouse.

Erin Inman, defense attorney for Gregg Trude, gives a closing argument Wednesday in the Lewis and Clark County Courthouse.

County Attorney Leo Gallagher gives a closing argument Wednesday in the Lewis and Clark County Courthouse.