This one is touring the world, and has been in Sydney.
There are lots of news items, photos and video clips by googling on its current Hong Kong appearance.
It has been deflated for maintenance (cleaning), and many children are traumatised.
Newspapers are claiming 'fowl play'.
During the visit, wharfside vantage points had much smaller rubber ducks on display, and children were carrying bath-size one.

Samples:
http://www.news.com.au/travel/news/hong-kong-deflated-over-lame-duck/story-e6frfq80-1226644141748
(link to video with scenes of Sydney, possibly during the test run with the monorail span open)
http://www.sbs.com.au/news/article/1766790/Rubber-duck-deflated-in-Hong-Kong-harbour
(photos)
http://au.ibtimes.com/articles/467990/20130516/deflation-big-yellow-duck-hong-kong-distresses.htm
(link to three different videos, including the original Muppets song)
http://au.sports.yahoo.com/news/hong-kong-cries-fowl-giant-053832000.html
and lots more.

Roderick B Smith
Rail  News Victoria Editor