Montana Peregrine Falcon Visibility Chart (Revised 5/13/2011)

Selection of cliff & courtship

Egg laying

 

Incubation

 

Young in Nest

Fledging

 

Dispersing

 

Medium

 

Medium

 

 

 

 

 

Medium

Medium

 

 

 

Medium

 

 

Medium

Medium

Low

High

 

High

High

 

Low

Low

 

Low

High

High

High

 

High

Medium

 

Low

Low

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

15

1

15

1

15

1

15

1

15

1

15

1

15

March

April

May

June

July

August

September

Visibility Low

 

Small chance of sighting falcons or finding nests

Visibility Medium Low

 

Possibility low for sighting falcons or finding nests-young dispersing from nesting cliff in September

Visibility Medium

 

Falcons can be seen and nests located, but adults and young are dispersing.

Visibility Medium High

 

Pairs active in defense of cliff, courtship, or feeding young.

Visibility High

 

Pairs very active in courtship, feeding young, or young are fledging.

Period

Nesting Chronology

1-15 March

Pairs are just beginning to return to cliff, if pairs do return to cliff--active in courtship.

 

 

 

16-31 March

Early in the period many pairs have not returned to nesting cliff. Later in period, many have returned.

Median Times

1-15 April

Most pairs have returned to nesting cliff. Begin laying eggs late in this period.

 

 

 

 

4/23-4/25-Egg laying

16-30 April

Pairs are mostly laying eggs and beginning incubation late in the period.

 

 

 

 

4/25 -5/27-Incubation

1-15 May

 

Most pairs are incubating.

 

 

 

 

 

 

 

 

 

5/27-7/07--Young in eyrie

16-31 May

Most pairs are incubating. Young are beginning to hatch toward the end of period.

 

 

 

7/08--Young fledge

1-15 June

Young in small downy stage, feeding bouts and food exchanges infrequent.

 

 

 

 

16-30 June

Young in large downy stage and later in the period should be visible on ledges.

 

 

 

 

 

Food exchanges and feeding bouts frequent.

 

 

 

 

 

 

1-15 July

 

Young very visible on ledges early in the period, fully feathered and ready to fledge

 

 

 

 

 

later in the period. Parent and young very vocal and feeding bouts frequent.

 

 

 

 

16-30 July

Young have fledged or are fledging from the nest. Feeding bouts frequent, both parents

 

 

 

 

and young are very vocal. Young begin to hunt.

 

 

 

 

 

 

1-15 August

Young have fledged, dispersing further and further from nesting cliff. Young begin hunting on own.

Young gaining hunting expertise.

 

 

Nesting cliffs difficult to find because of dispersal. Parents feeding young less often.

 

 

 

16-31 August

Young gaining greater flight and hunting expertise. Parents seldom feed young.

 

 

 

1-15 Sept.

Young mostly dispersed from nesting cliff. Young hunting mostly on their own.

 

 

 

16-30 Sept.

Young dispersed from nesting cliff, independent.

 

 

 

 

 

 

Note: This Chronology can vary yearly and among individual pairs.

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