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9 March 2021 OBSERVATIONS OF ORANGE-CROWNED WARBLERS IN VINE MAPLE
Carolyn M Coyle, Dustin G Gannon
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Abstract

We conducted a pilot study assessing the role that Orange-crowned Warblers (Oreothlypis celata) may play in the pollination of Vine Maple (Acer circinatum). We observed an Orange-crowned Warbler probing its head into different inflorescences between 2 focal trees. We also incidentally observed O. celata individuals foraging in Big-leaf Maple (Acer macrophyllum) inflorescences and a Wilson's Warbler (Cardellina pusilla) feeding in the flowers of a Vine Maple. Our observations and results from the pilot experiment excluding large-bodied pollinators from flowers lead us to suggest that warblers may forage at Vine Maple flowers in a manner that could contribute to pollination; however, further study to confirm that warblers transfer pollen from anthers to conspecific stigmas is warranted.

Carolyn M Coyle and Dustin G Gannon "OBSERVATIONS OF ORANGE-CROWNED WARBLERS IN VINE MAPLE," Northwestern Naturalist 102(1), 94-95, (9 March 2021). https://doi.org/10.1898/1051-1733-102.1.94
Received: 16 July 2020; Accepted: 11 September 2020; Published: 9 March 2021
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