Rare bird sitings along Moonee Ponds Ck [whataboutMerri Ck? - both Melbourne area]

["Peter Shute" <>]

> simply because they fell below the cutoff. Another
> possibility is to ask observers to estimate their survey
> effort, e.g. in hours, and only include those surveys with a
> significant effort, e.g. over one hour, but you are still
> left with significant biases (comparing one-hour with 24-hour
> surveys) and uncertainties (is my one-hour effort comparable
> to yours? - I might have just been casually observing whilst
> having lunch).

Perhaps just add a box to tick: "Have you included all species seen?".
That would allow you to produce lists excluding biased surveys, or to
flag the species that were included in them.  Maybe something similar
about whether they've included introduced species.

Peter Shute
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