A Shocking headline.
The reality of what is happening to our Hen Harriers in Ireland. The reality
of what is happening to our remaining, dwindling population of Hen Harriers in
Ireland.
Sky and Blackwater flew the flag for their species. We wanted to see what is
happening to our population, where do they go, what do they do? We wanted to
see why so few wing tagged birds were returning to the population.Through this
satellite tracking, we have gained a clearer picture as to why our population
is decreasing, why Hen Harriers have been lost from so much Ireland.
Even when against the odds, they manage to
rear young to fledging, those fledglings are finding it very difficult to
survive and may be dead within weeks of leaving the nest.
|
Blackwater as a nestling |
Blackwater, our beautiful female, had made a bid to become independent of
her parents and travelled along her native Blackwater Valley until she reached
farmland near the village of Cullen, just north of Millstreet, Co. Cork. Her
satellite tag has not transmitted for over two weeks now, indicating that she
has most likely perished. To have watched this chick grow from the time she was
just a ball of fluff in the nest with her brother and sister, to see the
painstaking efforts to which her parents went to rear her, to see the potential
she held to become a fully independent, stunning female harrier, and ambassador
for her species; all to end in tragedy is heart breaking.
Blackwater's Movements. Click to enlarge
Sky was found dead just 350 metres from his nest. There was a fox scat in
his nest (a small patch of scrub surrounded by forestry) which may indicate
predation as the cause of death (his body also lay close to a fox track),
although lack of food is also a possibility given the light weight of his body
when found.
Four young harriers were satellite tagged in England and Scotland this year by
Stephen Murphy (who tagged Blackwater and Sky here in Ireland) using the very same
tags and very same methods and all are performing brilliantly now as
independent harriers. Hen Harriers in Ireland clearly have a more difficult
start in life than elsewhere.
The worrying thing is, Sky’s parents and Blackwater’s parents cannot live
forever and when young harriers are not surviving to take their place on the landscape,
we lose our population and this has been happening for some time now.
Population Viability Analysis shows that the Irish Hen Harrier population is
not reproducing enough to sustain itself.
1.
The adult Hen Harriers are finding it difficult to find food.
Due to changes in the landscape that Hen Harriers have relied on for
centuries (i.e. moorland, scrub and farmland -much of which has been destroyed,
removed or forested), food is no longer as plentiful or as easy to catch. The
Hen Harrier is not just a species in itself...because it depends on the smaller
animals and birds for food, it is a mirror to the natural world which we can
hold up and see how things are out there...if small animals and birds are doing
well, Hen Harriers are doing well; if small animals and birds are doing poorly,
Hen Harriers will suffer greatly…evidently things are rather poor in the
uplands. People should be dissuaded from the excuse of poor weather in 2012 as
a reason for decreased food resources, because territories experiencing the
same weather patterns had greatly differing food resources, primarily related
to habitat.
2.
The parent Hen Harriers are
spending longer away from the nests in search of food.
This means increased energy expenditure and weaker parents, lower food
delivery rates to the nest, less eggs, less chicks, weaker chicks, less brooding
of the chicks (for shelter, warmth and dryness) and increased chance of
predation (while the parents are away trying to find food). This summer, we
witnessed parent birds travelling massive distances over forestry before they
even reached their hunting grounds and there were days when chicks may have
received just one food item in a day, whereas they should have been receiving
around 20 food items in a day. Many nests in Ireland did not rear any chicks at
all this year due to lack of food and predation.
3.
The chicks, if and when they fledge, are finding it next to impossible
to make it on their own.
If experienced adult birds are finding it difficult to catch food. How
difficult must it be for an individual bird who has up until 3 weeks of having
left its nest been provided for by its parents, and suddenly left to fend for
itself and catch its own food? The deaths of Sky and Blackwater show just how
perilous it is for young Hen Harriers in Ireland. One should be dissuaded from
thinking “this is nature” because the landscape the Hen Harrier and many other
upland bird species depends on has been highly fragmented and augmented to the
stage where it is no longer natural and the odds are stacked against the
survival of many of our native species. The untimely deaths of Sky and
Blackwater should not be taken as isolated events. After years of wing tagging,
it is estimated that
four out of every
five Hen Harriers in Ireland dies before it reaches its first birthday.
Hen Harrier
Conservation
So, will we just leave it at that or continue to push for
Hen Harrier conservation in Ireland? What does Hen Harrier conservation mean?
It means whether we want to continue to experience the sight of sky dances or
food passes, or softly gliding ringtails or silver males in our landscape. Again,
the Hen Harrier is a mirror to the health of the upland landscape also. Many
places have already lost their local Hen Harrier population and the small
pockets that are left are now all the more important. An rud is annamh is
iontach – that which is rare is wonderful.
The future of the Hen Harrier ultimately lies with all stakeholders, landowners and conservation groups interested preserving our natural heritage.
One way in which you as an individual can help is to take part in national research
on the Hen Harrier, by submitting sightings or conducting roost watches. Anyone
that is willing to contribute and to experience Hen Harriers is encouraged to
contact home.of.harriers@gmail.com
Thanks to everyone who contributed to and wished this project well.