These are the pits created by Antlion or Ant Lion (Myrmeleontidae family) larvae. The larva hides itself in the centre waiting for its pray. When its pray (ants) fall into the pit, the ant lion grabs it and eats.
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About Sindhu
A nature lover and dreamer who expresses herself as an artist, fashion designer and blogger. Persued B.Sc fashion design at Karavali College
(Mangaluru University 2003 - 2006) with first rank. Former lecturer for fashion designing at Gloria College, Puttur for five years (2006-2011). Blogger since 2013.