Species: Aechmophorus occidentalis
Encyclopedia of Puget Sound

Eggs: in Oregon, mean length was 58.1 mm, mean width was 38.7 mm, and mean mass was 48.4 g (Hill et al. 1995, Condor 97:1062-1064).
Science Review:
Articles:
An article published in the Journal of Avian Medicine and Surgery in 2021 describes the results of study comparing the effects of season, location, species, and sex on body weight and blood chemistry for free-ranging western and Clark's grebes.

Why did all the grebes leave? Where did they go? And what does their disappearance say about the health of the Salish Sea? Seasonal declines among some regional bird species could hold important clues to the overall health of the ecosystem.

A June 19, 2013 paper in the journal PLoS ONE hypothesizes that regional declines in Western Grebe populations may be related to decreasing numbers of forage fish. Using citizen science data from 36 years of bird counts, researchers were able to look at population trends up and down the entire West Coast, finding that abundance of grebes decreased in the Salish Sea but increased in southern California. North American population declined by 52% overall.

This article was originally published by the Washington Department of Fish and Wildlife as part of its annual report Threatened and Endangered Wildlife in Washington.
More than 70 bird species regularly utilize Puget Sound during some or all stages of their life histories, but only a portion of these are actively being investigated.

Classification
Aves
Podicipediformes
Podicipedidae
Aechmophorus
NatureServe
Classification
Ecology and Life History
Eggs: in Oregon, mean length was 58.1 mm, mean width was 38.7 mm, and mean mass was 48.4 g (Hill et al. 1995, Condor 97:1062-1064).