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QUESTION-TYPE BASED TESTS
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TEST 8 – Saving the British Bitterns
The reading passage has seven paragraphs,
A-H.
Choose the correct heading for paragraphs
A-H
from the list below
.
List of Headings
i
research findings into habitats and decisions made
ii
fluctuation in bittern number
iii
protect the young bittern
iv
international
cooperation works
v
Began in calculation of the number
vi
importance of food
vii
Research has been successful.
viii
research into the reedbed
ix
reserve established holding bittern in winter
A .
Breeding bitterns became extinct in the UK by 1886 but, following recolonization early last century,
numbers rose to a peak of about 70 booming (singing) males in the 1950s, falling to fewer than 20 by the
1990s. In the late 1980s it was clear that the bittern was in trouble, but there was
little information on which
to base recovery actions.
B.
Bitterns have cryptic plumage and a shy nature, usually remaining hidden within the cover of reed bed
vegetation. Our first challenge was to develop standard methods to monitor their numbers. The boom of the
male bittern is its most distinctive feature during the breeding season, and we developed a method to count
them using the sound patterns unique to each individual. This not only allows us to be much more certain of
the number of booming males in the UK, but also enables us to estimate local
survival of males from one
year to the next
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