Montana Peregrine Falcon Visibility Chart
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Montana Peregrine Falcon Visibility Chart (Revised 5/13/2011)
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Selection of cliff & courtshipEgg layingIncubationYoung in NestFledgingDispersing
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MediumMediumMediumMediumMediumMediumMedium
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LowHighHighHighLowLowLowHighHighHighHighMediumLowLow
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MarchAprilMayJuneJulyAugustSeptember
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Visibility LowSmall chance of sighting falcons or finding nests
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Visibility Medium LowPossibility low for sighting falcons or finding nests-young dispersing from nesting cliff in September
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Visibility MediumFalcons can be seen and nests located, but adults and young are dispersing.
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Visibility Medium HighPairs active in defense of cliff, courtship, or feeding young.
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Visibility HighPairs very active in courtship, feeding young, or young are fledging.
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PeriodNesting Chronology
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1-15 MarchPairs are just beginning to return to cliff, if pairs do return to cliff--active in courtship.
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16-31 MarchEarly in the period many pairs have not returned to nesting cliff. Later in period, many have returned.Median Times
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1-15 AprilMost pairs have returned to nesting cliff. Begin laying eggs late in this period.4/23-4/25-Egg laying
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16-30 AprilPairs are mostly laying eggs and beginning incubation late in the period.4/25 -5/27-Incubation
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1-15 MayMost pairs are incubating.5/27-7/07--Young in eyrie
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16-31 MayMost pairs are incubating. Young are beginning to hatch toward the end of period.7/08--Young fledge
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1-15 JuneYoung in small downy stage, feeding bouts and food exchanges infrequent.
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16-30 JuneYoung in large downy stage and later in the period should be visible on ledges.
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Food exchanges and feeding bouts frequent.
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1-15 JulyYoung very visible on ledges early in the period, fully feathered and ready to fledge
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later in the period. Parent and young very vocal and feeding bouts frequent.
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16-30 JulyYoung have fledged or are fledging from the nest. Feeding bouts frequent, both parents
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and young are very vocal. Young begin to hunt.
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1-15 AugustYoung have fledged, dispersing further and further from nesting cliff. Young begin hunting on own.Young gaining hunting expertise.
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Nesting cliffs difficult to find because of dispersal. Parents feeding young less often.
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16-31 AugustYoung gaining greater flight and hunting expertise. Parents seldom feed young.
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1-15 Sept.Young mostly dispersed from nesting cliff. Young hunting mostly on their own.
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16-30 Sept.Young dispersed from nesting cliff, independent.
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Note: This Chronology can vary yearly and among individual pairs.
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