Kirsten Paasche '13, sifts through the recordings of crossbill birds in a lab at PLU on Friday, June 24, 2011.

Records of the recordings of crossbill birds in a lab at PLU on Friday, June 24, 2011.

Sonograms of the recordings of crossbill birds in a lab at PLU on Friday, June 24, 2011.

Assistant Professor Spencer Ebbinga, left, talks with A'Toya Mercer '11, planning summer term stone sculpture class on Thursday, June 23, 2011.

A'Toya Mercer '11, left, and Miranda Owen '13, discuss their sculptures during a summer term stone sculpture class on Thursday, June 23, 2011.

summer term stone sculpture class on Thursday, June 23, 2011.

Aaron Grossberg '12, and PLU Professor Julyie Smith placing treasures in a tree along the trail while gathering recordings of crossbills at Second Beach on the Olympic Peninsula near La Push Wa. on Tuesday, June 21, 2011.

Aaron Grossberg '12, and PLU Professor Julyie Smith placing treasures in a tree along the trail while gathering recordings of crossbills at Second Beach on the Olympic Peninsula near La Push Wa. on Tuesday, June 21, 2011.

Recording equipment used to capture the sounds of crossbills at Second Beach on the Olympic Peninsula near La Push Wa. on Tuesday, June 21, 2011.

PLU Professor Julyie Smith and Aaron Grossberg '12, gathering recordings of crossbills at Second Beach on the Olympic Peninsula near La Push Wa. on Tuesday, June 21, 2011.