The case of Qantas Airways Ltd v Edwards
Qantas uses a variety of "kangaroo" trade marks as
part of its business, including the "kangaroo tail fin"
logo below which it registered in Australia in 1996 for
advertising, marketing and merchandising services and
financial, investment and banking services associated with the use
and promotion of credit cards and charge cards (Registration
No. 711454):

In a recent Federal Court case, Qantas has unsuccessfully
opposed an application by Mr Luke Edwards to register the following
"kangaroo t-shirt" logo as a trade mark:

Mr Edwards operates an online retail store selling a range of
goods including clothing and apparel. In 2010, Mr Edwards applied
to register his "kangaroo t-shirt" logo above as a trade
mark, for use in relation to clothing; footwear; headwear;
shirts; T-shirts. At the time, Mr Edwards's online store
offered t-shirts branded with his "kangaroo t-shirt"
logo.