On Sun, 07 Nov 2010 11:59:33 +0000, Rusty Hinge
wrote:

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.

Easy to say. What and where are these "nearby mini-surveys"? And who
is carrying them out and correlating them?


The overall survey may also predict the future growth/deline of
populations, their movements, etc.

What "overall" survey? See above.

Alarming fluctuations can lead to
Something Being Done[TM].

And grants? Now why doesn't that surprise me?