UNLESS…Earth-friendly Chroniclers:Challenge 10 ~ “Biodiversity… I Spy”

Today was one of those days where autumn’s alchemy brews up a mellow mood – and not a breath of wind.  That’s a bonus for those of us living on a peninsula where the maritime winds racks up the knots.  Following Jane’s advice for this challenge to slow down and plan a stress free outing,  I set off with a neighbour and her son to visit one of the nature reserves in the False Bay ecology park: Rondevlei.   It’s forms part of a vital wetlands system, besides it has a trio of star-studded resident hippos.  I was in good company for Humphrey is 11 years old and into “I spy challenges” so we set off in high spirits to test the waters of this biodiversity “Hotspot”.

The impact of urbanisation across the Cape Flats wiped out much of the fragile ecosystem and little of the unique natural environment remains. It also has a dubious reputation as a notorious gangland riddled with drug peddling and high crime, but on the peripherary is this tranquil haven. Orignally set up as a bird sanctuary in 1952, it now plays a crucial role in conserving many of the critically endangered plant species and acts as a repository for endemics.  Presently it supports about 320 different plant species (10% of some 2600 species found on the Cape’s Peninsula).  The indigenous bush consist of two veld types – strandveld and coastal fynbos supports a complex ecosystem from ants to hippos.

Taking a closer look at the vegetation the area is dominated by the reed beds along the shore while the Strandveld occurs on the higher dunes.

On arrival we were welcomed by the Hadedah (Glossy Ibis) argh!! Locally they are known as “The mad women who laugh” because of their raucous cackling.  We so wanted to hear a Fish Eagle instead.  The Hadedah are relative newcomers having found their way over the western Cape mountains in the 1980’s.  They thrive too well in the urban scene.  The reserve records sightings of some 230 bird species.

The glossy ibis, or Hadedah.

 

We concentrated our observations on looking for diverse clues….  from spoor to scat; both those subjects hold an interest for Humphrey and we quickly picked up the trail of water mongoose, genet, grysbok, and a huge pile of fresh grass scat had our eyes out on stalks.   Generally hippo wallow in water during the day and forage at night; but here there were distinct signs that they were close. The trail went off into the bush and we wisely carried on by.

Genet spoor (large or small?) Cape grysbok spoor

Huge as they may be hippos can be elusive creatures, as was discovered when the younger male went ‘walkabout’ and was lost for weeks, spurring on a manhunt, which the clever creature eluded.  Months on he was finally found in the pools at the Strandfontein Waste Water Treatment Works.

Humphrey spots a nest –

Cocktail ants scurry on the edge of the nest. Cocktail ant's nest

What an opportunity to look more closely and identify that the species is the Cocktail ant, which build large communal fibre nests from chewing plant material and fixing it with saliva.  They are known to associate by mutualism with sucking insects such as soft scale, mealy bugs, aphids.  The ants offer shelter in exchange for the sticky sweet honeydew which the bugs secrete.

Although we didn’t spot many bird species, we were happy that sightings of a Jackal Buzzard had been recorded for the day as there is much evidence of rampant Cape Dune molerat activity.   Raptors would play a useful role in keeping down the population, as would the local snakes such as the Mole snake (of course!).

Although we were unlucky not to see the star of the show, the hippos – this last creature really made us smile.  An Angulate tortoise hot-footed it across our path at an impressive speed; so the hare could have been following close behind!

The visit today further impressed us with the work The City of Cape Town undertakes to conserve and enhance biodiversity in vulnerable areas.  It’s also a tribute to their endeavours in providing opportunity to the locals in nearby disadvantaged areas.  Part of their role is encouraging the school children, (some 7000 odd each year) who use the reserve for environmental studies in an otherwise urban landscape.

Thanks to Jane at www.justanothernatureenthusiast.org for inspiring another UNLESS topic … Biodiversity “I Spy”;  it was a most enjoyable outing 🙂

2012 in pictures.

Thanks to Sara and the WordPress team for the inspiring weekly challenge topics posted through the year.  It’s been a great way to learn new techniques and see what others create.   Of all the challenges, i really enjoyed “Reflections”  and Jared Bramlett’s cleverly composed shots.   This week’s topic is hard to cull down to twelve pictures, but here on the “Edge” it’s the creatures that count …..

Thank you too to all the readers who have stopped by to read and comment on Nature; it’s wonderful to have a link to so many different parts of the world.  May 2013 bring happy encounters, and rich blessings.

 

Cape Dune Molerat: cutting edge equipment.

Note the ‘built for purpose’ extended digging claws and the very interesting arrangement of teeth. The lower extend into two strong lifting and cutting apparatus, the upper are used for grasping. Think biomimicry: a combination fork-lift and grappling tool.

A strong tail, used for counterbalance and anchoring.
Extracting plants for the larder.

Molescape, showing the neat ‘mole-dunes’ and example of a flourishing colony of earth excavators.