Saw-Whet Owl

Food Habits of the Northern Saw-whet Owl in Central Iowa: Effects of Roost Location

Food Habits of the Northern Saw-whet Owl m Central Iowa: Effects of Roost Location

Correlations of Northern Saw-whet Owl Aegolius acadicus calling indices from surveys in southern Wisconsin, USA, with owl and small mammal surveys in Manitoba, Canada, 1986–2006

Nocturnal and cryptic, the Northern Saw-whet Owl (NSWO) Aegolius acadicus is a small (18–21.5 cm long) predator of small mammals, especially deer mice Peromyscus, voles (Microtus rangewide, Clethrionomys to the north), and shrews (Blarina, Sorex) (Johnsgard 1988, Swengel & Swengel 1992, Cannings 1993). This owl vocalizes primarily during its courtship and early breeding season (late winter to e...

Land slugs (Gastropoda: Pulmonata) on birds demonstrate dispersal potential

We describe the discovery of two slugs, Arion subfuscus and Deroceras reticulatum, on living adult birds captured for banding at Powdermill Nature Reserve, Rector, Pennsylvania. The presence of slugs on birds suggests that bird transport might play a role in slug dispersal. Additional keywords: Gray fieldslug, Deroceras reticulatum, dusky arion slug, Arion subfuscus, common yellowthroat, Geothl...

SAW dispersion

Nondestructive evaluation of the prevailing compressive residual stress in the shallow subsurface layer of surface-treated metals is greatly complicated by the accompanying surface roughness and cold work. A high-precision laser-ultrasonic technique has been developed to study the feasibility of SAW dispersion spectroscopy for residual stress assessment on surface-treated metals in a wide frequ...