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Eurasian Tree Sparrow

Passer montanus

Order:
Passeriformes
Family:
Passeridae
Sections
  • Authors: Barlow, Jon C. and Sheridan N. Leckie
  • Revisors: Barlow, Jon C., Sheridan N. Leckie, Peter Pyle and Michael A. Patten
  • Published: Jun 5, 2017
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Figure 1. Distribution of the Eurasian Tree Sparrow in North America.

This species also breeds in Europe and Asia and the northern Austral-Asian region. See text for details.

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Adult Eurasian Tree Sparrow.

Native to the Old World, the Eurasian Tree Sparrow was imported in the nineteeth century in to the St. Louis, Missouri area, where it became established. Face is white with with reddish-brown crown. Chin and upper throat are black, forming short, round or square-ended bib, with prominent black spot on cheeks. Underparts dingy grayish white with buff-brown wash. Sexes alike.

© Steve Collins , Missouri , United States , 10 January 2010

Eurasian Tree Sparrows were brought to St. Louis, Missouri, in the 19th century as part of a shipment of European songbirds imported from Germany. The birds were destined for release as part of a project to enhance the native North American avifauna. Around two dozen Eurasian Tree Sparrows were released in late April 1870, they bred successfully and gradually established a presence in the Midwestern United States. Typically a commensal of humans, it has, in part, been displaced from urban centers by another introduced species, the larger, more pugnacious House Sparrow (Passer domesticus). Today, the Eurasian Tree Sparrow is most frequently associated with wooded urban parkland, farms, and rural woodlots.

Although the Eurasian Tree Sparrow is widely distributed in the Palearctic, it has had relatively modest success in colonizing North America (especially in comparison to the House Sparrow), and its range has been localized to northeastern Missouri, west-central Illinois, and southeastern Iowa. However, in recent decades the Eurasian Tree Sparrow has experienced a 5.8% annual increase in Illinois based on the North American Breeding Bird Survey (Sauer et al. 2017), and data from eBird suggest an ongoing range expansion with large numbers of records in adjacent areas of the Midwest (see Distribution, Migration and Habitat).

Similar to the House Sparrow, the Eurasian Tree Sparrow has been studied extensively in its native range, and Summers-Smith 1995 provides an excellent introduction to the published literature. In North America, research has concentrated on breeding success (Anderson 1978b) and emerging differences between the ancestral population in Germany and the introduced New World population resulting from the constraints of a small founder population. Included are studies of changes in morphology (Barlow 1973, Barlow 1980a, St. Louis and Barlow 1991), genetics ( St. Louis and Barlow 1987, St. Louis and Barlow 1988), and song (Lang 1995, Lang and Barlow 1987, Lang and Barlow 1997). This account emphasizes North American data, whenever available.

Recommended Citation

Barlow, Jon C., Sheridan N. Leckie, Peter Pyle and Michael A. Patten. 2017. Eurasian Tree Sparrow (Passer montanus), version 3.0. In The Birds of North America (P. G. Rodewald, editor). Cornell Lab of Ornithology, Ithaca, New York, USA. Retrieved from the Birds of North America: https://birdsna.org/Species-Account/bna/species/eutspa