The one that you're interested in is listed as "in press" without a PDF yet. He'll probably link it up soon.
You could also try emailing him now at the address on that site. I've had great success email researchers directly and asking for (p)reprints of specific papers.
Comments
One of the authors of this paper, Raine, makes his papers available as PDFs:
http://www.biology.qmul.ac.uk/research/staff/chittka/chittka...
The one that you're interested in is listed as "in press" without a PDF yet. He'll probably link it up soon.
You could also try emailing him now at the address on that site. I've had great success email researchers directly and asking for (p)reprints of specific papers.