J. Chris Cole

The Feasibility of Nightlighting for Monitoring Brood Production of Wood Ducks on Rivers

To determine the applicability of the nightlighting technique for monitoring wood duck (Aix- sponsa) brood production on rivers in Tennessee, we compared results of day and night surveys on 8 rivers in spring 1990. Results of 32 day counts and 16 night counts showed that 112% more broods/km were seen at night (X = 0.55, SE = 0.022) than day (X = 0.26, SE = 0.20). The mean number of broods/km did not differ (P < 0.05) between replications for either night counts or day counts. There was a significant (P = 0.01) but weak (R = 0.61) relationship between the first day counts and night...

Distribution of Ruffed Grouse Southeast of the Range of Quaking Aspen

We delineated the distribution of ruffed grouse (Bonasa umbellus) southeast of the range of quaking aspen (Populus tremuloides), and estimated the total range-area and forested range-area within this expanse. All or portions of 11 states comprised a total range-area of 285,184.3 km2, 25.7% of the total land-area ofthose states. The percentage of each state occupied by ruffed grouse varied from 99.4% in West Virginia to 2.5% in each of South Carolina and Alabama. Approximately 67% of the species' range was forested.