In Hand Ageing and Sexing Techniques:

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In Hand Ageing and Sexing Techniques
Molt Pattern Shortcuts and Summaries
Adrienne J. Leppold and Robert S. Mulvihill
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North American Bird Bander Vol. 18 No. 1
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(No Transcript)
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Summaries of Molt Patterns for Passerines (and
some near passerines) - Know Where to Look

• Consistencies within genera and families of
  birds

- Ageing shortcuts
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CC/A1 Molt Limits
Parulids
Black-throated Blue Warbler
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Parulids
CC/A1 Molt Limits
Northern Parula
Cerulean Warbler
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CC/A1 Molt Limits
Parulids
American Redstart
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CC/A1 Molt Limits
Vireos
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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.
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tertials
CC/A1 Molt Limits
Emberizids
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tertials
CC/A1 Molt Limits
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tertials (and sometimes more)
CC/A1 Molt Limits
Spizella and Melospiza Sparrows
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GC Molt Limit
Turdid and Mimid Families
Gray-cheeked Thrush
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GC Molt Limit
Turdid and Mimid Families
Swainsons Thrush
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Turdid and Mimid Families
GC Molt Limit
Gray Catbird
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Turdid and Mimid Families
GC Molt Limit
Eastern Bluebird
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Turdid and Mimid Families
GC Molt Limit
American Robin
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Often an extensive molt including all GC, CC,
alula, tertials, additional inner secondaries and
outer primaries
Cardinalids
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Often an extensive molt including all GC, CC,
alula, tertials, additional inner secondaries and
outer primaries
Indigo Bunting
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Complete or nearly complete molt
Icterids
Northern Cardinal
Swallows
Presence of molt limit HY/SY Absence of molt
limit U/AHY
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Complete or nearly complete molt
Icterids can retain underwing coverts
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Complete or nearly complete molt
Icterids can retain underwing coverts
Brown-headed Cowbird
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Molt restricted to LC/MC Difficult to age
Kinglets
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A few Tricks of the Trade
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A few Tricks of the Trade
American Goldfinch
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A few Tricks of the Trade
Swamp Sparrow
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A few Tricks of the Trade
Black-and-White Warbler
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Swainsons Thrush