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

<p>This dataset includes counts of Marbled Murrelets (<em>Brachyramphus marmoratus</em>) 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.</p>