Ringing and Migration December 1976 Volume One Number Two

60 pages. • Mortality in British Gulls (pp. 65–74) by J.J.M. Flegg & R. A. Morgan: An analysis tracking recovery rates, life expectancy, and common causes of death across various gull species ringed in Britain. • Weights of Blackcaps on Migration by Colin J. Bibby: A study examining the weight changes and fuel/fat deposition dynamics of Blackcaps (Sylvia atricapilla) while on active migratory routes. • Some Biases in Cannon- and Mist-Netted Samples of Wader Populations (pp. 105–107): Exploring the selective trapping dynamics of different wading bird capture methods and how they affect demographic data. • Analysis of Ringing and Subsequent Recoveries from a Yorkshire Blackbird Roost (pp. 117–119): A localized tracking study documenting the site fidelity and geographic origins of wintering Eurasian Blackbirds. • Papers from Ringing Group, Bird Observatory and Local Bird Reports (pp. 121–124): A compiled synthesis of regional datasets highlighting active field research from voluntary bird ringers (SL#17/2).…