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

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

Sonograms of 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.

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

Kirsten Paasche '13, and Aaron Grossberg '12, sift through the recordings of crossbill birds in a lab at PLU on Friday, June 24, 2011.

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

Cones are stacked from an earlier seed count as part of the research on crossbill birds in a lab at PLU on Friday, June 24, 2011.

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

Kirsten Paasche '13, and Aaron Grossberg '12, sift through the recordings of crossbill birds while Julyie Smiths watches in a lab at PLU on Friday, June 24, 2011.