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Hello
Tobias,
Here
is the extract from the most relevant part of the GBS Report, to address that
issue (from page 36). Although taken out of context and without the graphs it is
a bit dry reading. Sorry- in context it is better. Although of course that
refers to the 1316 charts in the first 21 years, not the results from 2008/09.
So, 60 species on a chart is a good effort.
The range
of number of species recorded on individual charts is broad. Figure 18 shows the
spread. This is partly influenced by the number of observer-weeks as shown later
with Figure 23. The lowest score was on five charts that recorded only 13
species, up to one (Year 13 at Site 248) that recorded 99. Only 12 charts had
over 75 species. The mean, mode and median of species (i.e. number of records)
per chart are 41.16, 36 & 39 (respectively). There is a clear impression
(supported by the observers differed in their interpretation of the instruction
(which varied on the different chart versions) to include birds within the 100
metre radius area. This surely questionnaire survey of 1988), that the variation
relates to the combination of effort put in, habitat involved and experience
level of the observer. There is little doubt that played a role in the variation
of number of species (records) per chart.
Philip Veerman
24 Castley Circuit
Kambah ACT 2902
02 - 62314041
Hi All,
I was wondering how everyone ' s GBS
sites went last year (well the GBS year that just past). This was the first year
I did it.
I was surprised to turn up 60 species for the whole
year, which I thought was very good, and certainyl worthwhile repeating. What
does everybody else get? I suppose the rural sites may get more, depending where
they are.
Any really notable amazing birds?
Oh well, its the holidays for me (thats probably
why I'm writing:)))
Cheers
Tobias
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