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Original non-fiction feature article written for Revision Library.
1 For more than a century, no osprey built a nest in Essex. These
2 fish-eating birds of prey, sometimes called "sea hawks", vanished from most of lowland
3 Britain during the nineteenth century, driven away by hunters who prized their feathers
4 and by farmers who saw them as a threat to fish stocks. By
5 the 1840s the last pairs had gone from the county's rivers and marshes,
6 and for generations Essex families grew up never having seen one soar above
7 the water.
8 That changed on a windy morning in April, when a warden at Abberton
9 Reservoir noticed a large, pale-bellied bird circling above the western basin. Priya Chatterjee,
10 who has worked at the reserve for eleven years, described the moment she
11 raised her binoculars. "I honestly thought I was imagining it," she said. "Ospreys
12 pass through Essex on migration most springs, but they never usually stay. This
13 one circled three times, then dropped feet first into the water and came
14 up with a rainbow trout in its talons. I knew straight away this
15 bird meant business."
16 Over the following fortnight, the osprey was joined by a second bird, and
17 the pair began carrying sticks to the top of a specially built platform
18 that conservationists had raised on a dead oak two years earlier, more in
19 hope than expectation. By the middle of May, a scruffy nest of branches
20 and reeds had appeared, lined with soft grass and sheep's wool gathered from
21 the surrounding fields. Visitors travelled from across the country to watch the pair
22 through telescopes set up along the reservoir path, and a live camera trained
23 on the nest was watched online by thousands of people every week.
24 Ospreys are unusual among British birds of prey because almost their entire diet
25 is fish. Unlike a kestrel or a buzzard, which will happily eat small
26 mammals, insects or carrion, an osprey hunts almost exclusively by plunging feet first
27 into open water, sometimes from a height of thirty metres or more. Its
28 outer toe can rotate backwards, so that two talons grip the front of
29 a slippery fish and two grip the back, an adaptation found in no
30 other bird of prey native to Britain. Once airborne again, the osprey turns
31 its catch to face forwards, reducing drag as it flies back towards the
32 nest.
33 The return of a breeding pair to Abberton matters for reasons beyond one
34 nest. Conservationists use the presence of ospreys as a rough measure of a
35 wetland's overall health, since the birds will only settle where fish stocks are
36 plentiful and the water is clean enough to hunt in. Naomi Reyes, an
37 ecologist with the Essex Wildlife Trust, explained that Abberton's transformation had taken decades.
38 "This reservoir was built in the 1930s mainly to supply drinking water," she
39 said. "Nobody was thinking about wildlife back then. But over the last thirty
40 years we have planted reedbeds, restricted certain areas during the breeding season and
41 worked hard to keep pollution out of the feeder streams. An osprey nest
42 is proof that all of that effort has paid off."
43 Not everyone was pleased when news of the nest spread. Wildlife crime remains
44 a serious problem in parts of rural Britain, and rare birds of prey
45 are sometimes targeted by egg collectors or persecuted by people who wrongly believe
46 they threaten farming or fishing interests. For this reason, the exact location of
47 the nest was kept out of local newspapers for several weeks, and volunteers
48 took turns watching the platform from a hide overnight until the first chick
49 had safely hatched.
50 By early July, three chicks could be seen in the nest, their heads
51 already tipped with the pale feathers that would eventually spread across their whole
52 bodies. If they survive to fledge, they will make the eight-thousand-kilometre journey to
53 West Africa along the same route their parents took, without a single adult
54 to guide them, relying on an instinct that scientists still do not fully
55 understand. Naomi Reyes is cautiously hopeful about what comes next. "One nest does
56 not mean the ospreys are back in Essex for good," she said. "But
57 it means the door is open. If these chicks return in a few
58 years and find a mate, we could be looking at the first proper
59 Essex osprey population in over a hundred and fifty years."