On Sun, 21 Aug 2005 14:47:21 +0100, John wrote:

On Sun, 21 Aug 2005 15:21:49 +0200, martin wrote:

On Sun, 21 Aug 2005 13:23:20 +0100, Jaques d'Alltrades
wrote:

The message
from martin contains these words:

.... how many sparrow hawks does it take to eat millions of sparrows
per year??

Divide 'millions' by (say) 10 ? 7 ? 52 and you might be surprised at the
result.

To save you the trouble, somewhere near 275 sparrowhawks per million
sparrows, assuming that one sparrowhawk will kill (and not necessarily
eat all of) ten sparrows per day.

Oh, and I didn't see the OP (probably crossposted), but the songthrushe
population is *NOT* declining, it is growing quite markedly.

http://www.garden-birds.co.uk/birds/housesparrow.htm
The House Sparrow is a Red List species owing to a serious decline
(over 60%) in its population

The guy is talking out of his backside. The song thrush is STILL very
firmly a RED LIST subject.

Quite.