The results of the project AQUILALP.NET
confirm that the Golden Eagle populations in the Alps
have recovered very well. In the studied parks a total
of 72 breeding-pairs could be confirmed. This equals
about 10 % of the total population in Austria and Italy.
Obviously Golden Eagles inhabit also areas outside the
parks studied in this project, but information about
that part of the population is generally very scarce.
Yet we can assume that Golden Eagles today have reoccupied
all suitable habitats in the Alps.
In the course of this project
the breeding success of about 70 pairs of Golden Eagles
is regularely monitored. The map shows all those territories
marked with a dot (click on the map to enlarge) …
Golden Eagles are long-lived birds
of prey. Their yearly reproductive rate is relatively
low and can show dramatic differences between the years.
The main reason for this is that not every egle-pair
starts a breeding attempt in every single year.
In the course of the project AQUILALP.NET
the breeding success of Golden Eagles in all participating
parks was studied in much detail. Although the number
of fledglings raised per pair varied between 0.13 und
0.79 the overall average (calculated across all years
and all parks) was as high as 0.47. This means that
in average every second pair successfully raised a chick.
During the years of the project more than 100 young
Golden Eagles left their nests.
On of the main factors determining
the breeding success of a Golden Eagle population is
the proportion of pairs that start a breeding attempt
in a given year. This proportion lay between 25 and
100 percent in the parks studied in this project –
in average two thirds of the known breeding pairs started
a breeding attempt in every year.
The number of fledglings raised
per pair varied between 0.13 und 0.79 (click on the
figure to enlarge) …
The proportion of breeders varied
between 25 and 100 percent (click on the figure to enlarge)