Hi Richard, firstly thanks for the link to the spiders section of my website, Hiking Hong Kong. I actually found your site because I recently ran into a wild boar and it terrified me half to death. They can get big! This one started charging at me and my instinct kicked in as you mentioned it would though instead of climbing up a tree, I roared back at it as it loudly snorted/roared at me and luckily for me it got a shock, turned around, and ran the other way. The only other time I've been as scared on a hiking trail was when an 8 meter Burmese python almost fell on my head as it slithered off a rock. Oh, and an encounter with a Chinese Cobra. As for other dangerous creatures in Hong Kong, especially around the city center, I would add cockroaches to the list. Dangerous because I am so creeped out by them!