Thanks everyone who has commented on my photographs of crocs
with stained teeth in Nairobi’s National Parks hyena dam .
The most probable answer has come from Munir Virani and Rupert
Watson that the cause is high levels of fluoride in the water. The dam receives
run-off water from the nearby housing estates which is almost certain to be
borehole water containing high levels of fluoride. I wonder if it effects birds
in any way?
Regards to all.
Dave Richards
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