Thread: Is it important?
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Old 07-11-2010, 11:59 AM posted to uk.rec.gardening
Rusty Hinge[_2_] Rusty Hinge[_2_] is offline
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Default Is it important?
wrote:
On Sat, 6 Nov 2010 18:48:42 +0000, kay
wrote:

/snip/

Counting is on the basis of the maximum number of birds seen at one time
(which is a lower bound on the actual number of birds).

Which gives no indication of the actual number of birds.

But when correlated with the same locations or rsults of nearby
mini-surveys over time, will give an indication of a trend.

The overall survey may also predict the future growth/deline of
populations, their movements, etc. Alarming fluctuations can lead to
Something Being Done[TM].

--
Rusty
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