Day two of our visit to Kangaroo Island began with the Kelly
Hill Caves, an extensive cave system with lovely caverns, and many stalagmites
and stalactites. We had a ranger-led
tour deep into the complex:
At Hanson Bay I couldn’t resist another wild Koala photo:
We then went to a formation called “Remarkable Rocks” and
learned of the geologic activity which led to its creation, following which we
hiked down to and on to the rocks. They
are pretty amazing:
After lunch we went to a long and difficult predominately
vertical walk (on a boardwalk and stairs) to a truly beautiful natural arch, out of which
you could see a large colony of Australian Fur Seals cavorting in the waves and
on the rocks. They truly seemed to be
having fun:
We then went to a lovely reserve where there is a path
called “Koala Walk”. Many eucalyptus
have been planted in broad avenues to attract koalas, and it’s been successful:
A comment on the Australian marsupials, which are
fascinating. Most of their joeys (all
marsupial newborns are called joeys) are born incredibly tiny, weighing on the
order of 2 or 3 grams (one tenth of an ounce).
They must make their way from the birth canal to the pouch on their own,
and find their teat in the pouch. They
then glom on to a teat and don’t let go for months until their development is
far advanced and they can stick their heads out of the pouch. The female kangaroo is fertile just a couple
of weeks after giving birth, while she is lactating, and can have joeys of
different ages in her pouch at the same time.
Even more remarkably, the milk she gives can be different from different
teats depending on the age of the joey nursing, as the milk content required is
different at different ages. The
echidnas (we saw a spiny anteater) are monotremes and have a cloaca from which
all things exiting the body come. These
remarkable egg-laying mammals curl up into a ball to deliver the fertilized egg
into the pouch where it is held until delivery of the baby which then nurses on
the fur over the mammary glands, as they have no nipples. This has been an amazing biology lesson!
Tomorrow Australian wines.
Victor - you MUST give us an explanation of that boulder you are hefting! It looks rock like, but it must be incredibly light. Even if it is frothy and air filled I can't imagine that it would be that light!!!
ReplyDeleteBob
Cropping! The rock is an overhang.
ReplyDelete