The bill skin of the platypus and echidna detects tactile stimulation via the push-rod, thought to be a type of mechanoreceptor.
Platypus monitoringNight-time platypus monitoring at Olinda Creek, Lilydale.As part of our role as waterways manager, Melbourne Water conducts regular surveys of platypus populations in rivers and creeks. These surveys are about monitoring the health of our waterways and the animals that live in them.
Backyard EchidnaThis echidna was ferreting around in the leaves in my backyard.
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"The other prominent receptor in the bill skin of both the platypus and echidna is the 'pushrod,' which is thought to be a mechanoreceptor responding to tactile stimulation." (Fowler and Miller 2003:279)