Director's Report for 1980
Jennifer M. Shay

Sizes of adult Yellow Warblers in relation to sex, age and reproductive success
Gloria C. Biermann, Department of Zoology, University of Manitoba

Selection on advertising behaviour in birds
Susan Cosens, Department of Zoology, University of Toronto

Comparison of the ectoparasitic fauna of Eastern and Western Kingbirds at Delta Marsh, Manitoba
C. E. Mackenzie and D. I. Mackenzie, Department of Zoology, University of Manitoba

Aspects of foraging behaviour in Northern Orioles
Joan Morgan, Department of Zoology, University of Manitoba

An investigation of the effect of light on epiphytic algae growing on artificial substrates
Gordon G. C. Robinson and Mary Putt, Department of Botany, University of Manitoba

Ecological relationships of birds in the forested dune ridge, Delta Marsh: short- and long-term studies (Abstract)
Spencer G. Sealy, Department of Zoology, University of Manitoba

The effect of fire on reed-dominated plant communities in the Delta Marsh
Donald J. Thompson, Department of Botany, University of Manitoba

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