Common Loon Incubates Rocks as Surrogates for Eggs

Stephen DeStefano; Kiana K. G. Koenen; Jillian W. Pereira

doi:10.1656/045.020.0111

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Stephen DeStefano,^1,* Kiana K. G. Koenen,² Jillian W. Pereira³

¹1US Geological Survey, Massachusetts Cooperative Fish and Wildlife Research Unit, University of Mass
²2Massachusetts Department of Conservation and Recreation, Division of Water Supply Protection, Belch
³3Massachusetts Department of Conservation and Recreation, Division of Water Supply Protection, West

^*Corresponding author - sdestef@eco.umass.edu.

Abstract

A nesting Gavia immer (Common Loon) was discovered incubating 2 rocks on a floating nest platform on the Quabbin reservoir in central Massachusetts for 43 days, well beyond the typical period of 28 days, before we moved in to investigate. The rocks were likely unearthed in the soil and vegetation used on the platform to create a more natural substrate for the nest. We suggest sifting through soil and vegetation to remove rocks before placing material on nest platforms.

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Stephen DeStefano, Kiana K. G. Koenen, and Jillian W. Pereira "Common Loon Incubates Rocks as Surrogates for Eggs," Northeastern Naturalist 20(1), 143-147, (1 March 2013). https://doi.org/10.1656/045.020.0111

Published: 1 March 2013

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