Dataset for: A 31-year time series of at-sea counts shows a non-significant decline of Marbled Murrelets at Laskeek Bay, Haida Gwaii, 1990-2020

This dataset includes counts of Marbled Murrelets (Brachyramphus
marmoratus) conducted from a small boat near Laskeek Bay on the east coast
of Louise Island, and north of Lyell Island in Haida Gwaii, from 1990 to
2020. The dataset includes counts of Marbled Murrelets observed on the
water or flying by. Information is also included on the date, time of day,
survey width, and spatial coordinates of the transects where the
observation took place.