Friday, 3 April 2015

Same crab a year later

Digital cameras are opening up new avenues for understanding our world.  Today I discovered that I can track individual fiddler crabs using the pattern on their backs.  I first photographed this crab on 18 April 2014 and then yesterday on 4 April 2015.  This is clear evidence that some fiddler crabs live at least a year.  
Adult male Uca triangularis in April 2014

Same crab in same place in April 2015

The ground is a little different between photos too.  In the first photo, the ground had just been scoured by a flood associated with a cyclone.  In the second photo, sand has returned to the substrate and has covered up the exposed roots.

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