Swainson's Thrush

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Swainson’s Thrush Catharus ustulatus Account #: 8365 Species code: SWTH Band size: 1B Skull: 1 Nov (Small windows may remain indefinitely) Pyle: p397 Moult timing Sibley: p407 Moult Formative Definitive Basic 10 primaries (10th reduced) 9 secondaries 12 tail feathers Juvenile plumage is distinctive. Formative and basic plumages are very similar. The absence of moult limits is not easily discerned. Ageing Use moult limits to separate formative plumage from basic plumage. Tail shape may be reliable in some cases, but intermediates occur. P10 length may also be useful. Moult limit Formative Basic Juvenile feathers among the great- er coverts typically have buffy tips. Spots are generally larger on the innermost feathers. Spots become more subtle and may disappear when feathers are worn. Tail Shape Juvenile/Formative Basic The angle of the feather tip differs. Formative = 88° angle Basic = 109° angle Worn feathers may be misleading. Sexing Juvenile Formative Basic No known plumage methods. During the breeding season cloacal protuberance and brood patch are well developed. References: Collier & Wallace 1989, MacGill Bird Observatory, Morris & Bradley 2000, Pyle 1997, Tabular Pyle 2007. Images: David Hodkinson. Compiled by David Hodkinson, 12 December 2011; North American edition General editor: David Hodkinson - [email protected] 8365 Identification Similar species: Hermit Thrush, Grey-cheeked Thrush, Bicknell’s Thrush & Veery. Hermit Thrush Swainson’s Thrush P6 emargination P9 P9 Swainson’s - No emargination Hermit - Emarginated Grey-cheeked - Often emarginated Veery - Slight emargination P6 P6 Wing Formula Hermit: P9 < P6, Swainson’s, Grey-cheeked & Veery: P9 > P6 Hermit Thrush Swainson’s Thrush Back vs Tail colour Swainson’s - No contrast Hermit - Tail colour contrasts with back colour. Grey-cheeked - No contrast Veery - No contrast Hermit Thrush Swainson’s Thrush Gray-cheeked Eye ring Swainson’s - Buffy Hermit - White Grey-cheeked - Indistinct, white Veery - Indistinct, greyish a Bird in the Hand is a collaborative project to gather, share and develop knowledge of bird aging and sexing techniques. For more information please visit: www.abirdinthehand.org.

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Hermit Thrush (<Em>Catharus Guttatus</Em>) and Veery (<Em>C
East Tennessee State University Digital Commons @ East Tennessee State University Electronic Theses and Dissertations Student Works 5-2010 Hermit Thrush (Catharus guttatus) and Veery (C. fuscescens) Breeding Habitat Associations in Southern Appalachian High-Elevation Forests. Andrew J. Laughlin East Tennessee State University Follow this and additional works at: https://dc.etsu.edu/etd Part of the Terrestrial and Aquatic Ecology Commons Recommended Citation Laughlin, Andrew J., "Hermit Thrush (Catharus guttatus) and Veery (C. fuscescens) Breeding Habitat Associations in Southern Appalachian High-Elevation Forests." (2010). Electronic Theses and Dissertations. Paper 1695. https://dc.etsu.edu/etd/1695 This Thesis - Open Access is brought to you for free and open access by the Student Works at Digital Commons @ East Tennessee State University. It has been accepted for inclusion in Electronic Theses and Dissertations by an authorized administrator of Digital Commons @ East Tennessee State University. For more information, please contact [email protected]. Hermit Thrush (Catharus guttatus) and Veery (C. fuscescens) Breeding Habitat Associations in Southern Appalachian High-Elevation Forests __________________ A thesis presented to the faculty of the Department of Biological Sciences East Tennessee State University In partial fulfillment of the requirements for degree Masters of Science in Biological Sciences _________________ by Andrew J. Laughlin May 2010 __________________ Dr. Fred J. Alsop III, Chair Dr. Istvan Karsai Dr. Thomas F. Laughlin Keywords: Birds, Habitat Partitioning, Principal Components Analysis ABSTRACT Hermit Thrush (Catharus guttatus) and Veery (C. fuscescens) Breeding Habitat Associations in Southern Appalachian High-Elevation Forests by Andrew J. Laughlin The Hermit Thrush is a new breeding bird in the Southern Appalachian high-elevation mountains, having expanded its range southward over the last few decades.
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