you've photographed one of the most beautiful and amazing caterpillars of a moth karman! I'd give almost anything to take a picture and save this caterpillar on my own... Also I don't think they exist in portugal..there are some similar species, but very rare!
there you've a Xylophanes tersa aka TERSA SPHINX MOTH... check out on the internet the beautiful moth it will be! also these can be found in brown or green caterpillar!:) cheers! any time you need help ask me, and sorry if i missed many of your posts, I check photoblog from time to time, and i didn't give a time yet to visit my friend's work! :);) keep shooting!