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.

--
Rusty
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