The breeding cycle of the White-tailed Eagle on Mull commences in
late Winter, when courtship display and prospective nest site
selection may take place. White-tailed Eagles form life-long
monogamous partnerships once they become sexually mature. This
usually happens when birds are around five years of age, although
some individuals may be precocious and attempt to breed at an
earlier age. White-tailed Eagles are remarkably faithful to their
partners and to their chosen nest location. Individuals will only
form a fresh pair bond should an existing partner die.
White-tailed Eagles are long-lived, with the oldest recorded bird
reaching the age of 32 years. The original pair of birds that
settled to breed on the Isle of Mull in the early 1980’s are now
approaching the grand old age of 30 years and are showing no signs
of giving up just yet.
Noisy Individuals
White-tailed Eagles, in particular the male, can be very vocal
during courtship and at the onset of the breeding season, in
contrast to the Golden Eagle. This frequent loud calling often
takes place in the vicinity of the eyrie and consists of a series
of yelping cries increasing in tempo and pitch. Should the adults
become alarmed a loud and far-carrying ‘klee-klee-klee(-klee)’ is
uttered, often piercing the tranquility of the Isle of Mull
countryside in early Spring.
Sky Dancers
White-tailed Eagles have a characteristic aerial courtship
display, which culminates in the pair locking talons in mid-air
and whirling earthwards at great speed in a series of spectacular
cartwheels. This death-defying stunt may come to an end only a few
feet above the ground or water before the birds soar upwards again
and is a thrilling, once-in-a-lifetime experience for many
birdwatchers.
