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Bird Banding Techniques & Molt Patterns | Ageing & Sexing Tips

Learn age and sexing techniques for birds using molt patterns and summaries. Discover shortcuts for ageing passerines and near-passerines based on consistent patterns within genera and families. Explore exceptions to the rules observed in some bird species, with detailed guidelines on identifying age and sex characteristics. Gain insights into the molt limits of various bird families, including sparrows, thrushes, robins, and warblers. Enhance your bird banding skills with practical tips and tricks of the trade.

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Bird Banding Techniques & Molt Patterns | Ageing & Sexing Tips

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  1. In Hand Ageing and Sexing Techniques: Molt Pattern Shortcuts and Summaries Adrienne J. Leppold and Robert S. Mulvihill

  2. North American Bird Bander Vol. 18 No. 1

  3. Summaries of Molt Patterns for Passerines (and some near passerines) - Know Where to Look • Consistencies within genera and families of birds - Ageing shortcuts

  4. CC/A1 Molt Limits Parulids Black-throated Blue Warbler

  5. Parulids CC/A1 Molt Limits Northern Parula Cerulean Warbler

  6. CC/A1 Molt Limits Parulids American Redstart

  7. CC/A1 Molt Limits Vireos

  8. Exceptions to the Rule (for CC/A1 moltlimits) Common Yellowthroats and White-eyed Vireos can often have a more extensive molt including outer PP and inner SS.

  9. + tertials CC/A1 Molt Limits Emberizids

  10. + tertials CC/A1 Molt Limits

  11. + tertials (and sometimes more) CC/A1 Molt Limits Spizella and Melospiza Sparrows

  12. GC Molt Limit Turdid and Mimid Families Gray-cheeked Thrush

  13. GC Molt Limit Turdid and Mimid Families Swainson’sThrush

  14. Turdid and Mimid Families GC Molt Limit Gray Catbird

  15. Turdid and Mimid Families GC Molt Limit Eastern Bluebird

  16. Turdid and Mimid Families GC Molt Limit American Robin

  17. Often an extensive molt including all GC, CC, alula, tertials, additional inner secondaries and outer primaries Cardinalids

  18. Often an extensive molt including all GC, CC, alula, tertials, additional inner secondaries and outer primaries Indigo Bunting

  19. Complete or nearly complete molt Northern Cardinal Swallows Icterids Presence of molt limit = HY/SY Absence of molt limit = U/AHY

  20. Complete or nearly complete molt Icterids can retain underwing coverts

  21. Complete or nearly complete molt Icterids can retain underwing coverts Brown-headed Cowbird

  22. Molt restricted to LC/MC = Difficult to age Kinglets

  23. A few “Tricks of the Trade”

  24. A few “Tricks of the Trade” American Goldfinch

  25. A few “Tricks of the Trade” Swamp Sparrow

  26. A few “Tricks of the Trade” Black-and-White Warbler

  27. Swainson’sThrush

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