The Migration of BirdsCoward, T. A. (Thomas Alfred)
Science
The Migration of Birds
Coward, T. A. (Thomas Alfred)
Birds -- Migration
On the night of March 29th to 30th, 1911, the south-eastern extremity of
Ireland experienced a remarkable rush of migrants, and the local papers
were full of the avian disaster, for large numbers of birds struck
the lights as well as buildings and other objects in inland towns. Mr
Barrington collected information (4), and found that most of the birds
were starlings, though thrushes, blackbirds, and redwings were numerous.
He received specimens of woodcock, water-rail, snipe, dunlin, meadow
pipit, wheatear, goldcrest, starling, song thrush, redwing, blackbird,
black redstart, robin, skylark, and stonechat, whilst some thirteen or
fourteen other species were said to have been recognised, amongst them
oyster-catcher and wild duck. The area affected lay south-east of a line
drawn across country from Balbriggan to the Old Head of Kinsale, with
a coast line of some 200 miles; most of the birds noticed inland were
at towns on the rivers Suir, Barrow, and Nore. The flight was mostly
north-east, and at the lights offshore, towards the land. Mr Barrington
gives the following explanation. After crossing the Channel the coast
of Wexford was reached and the stream divided, some going north along
the east coast and others westward along the south coast, but changing
their direction when they reached the wide mouth of the Barrow. The
flocks which passed Lucifer Shoals, 10 miles offshore, proceeded north
without touching Wexford. Northerly and easterly winds had prevailed for
weeks prior to the 29th over France and the British Islands, and birds
would be held up in southern Europe; the milder coastwise temperature
of western France, he thinks, would cause them to take a more westerly
course than usual. On the morning of the 29th the wind changed to the
south at Valentia, Pembroke and the Scilly Islands, and there was an
average rise of 7° in temperature at French stations. This rise and the
southerly wind liberated the birds, but as the wind continued north-east
or east in England they "decided" to take a longer and more exhausting
course than usual, pass to Ireland and then turn north-east. The change
took place exactly on the last day of the last quarter of the moon--the
darkest night for travel. A bank of fog and drizzle met them off the
Irish coast, and baffled and weary they were attracted by the lights,
not only on the coast but in the inland towns they passed.
Public-domain text, read in full here on John Shaqi.
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