Hi Goosey,
Ahw, rats ... answer too long ... I'll send you a PM, leaving the first bit here for others to read too:
In general, choose your preferred language first (top right), then select "Overviews", "Areas" from the menu. Have a look at area
Nationaal Park Zuid-Kennemerland or select one of the sub-areas defined within the park from
this list.
Please keep in mind that waarneming.nl is basically a Web 2.0 site (community effort). Some groups (such as birds) are very well checked/maintained by a group of expert administrators, but in other areas (many insect groups for exampe) there are way too few admins and the database collects a lot of "questionable" (plain wrong) ID's/sightings.