In fact, in some caves, there exist whole communities of creatures that have
no sight. Blind mckelviphibians, devoid of all pigmentation, choke down
fistfuls of bugs while crooning mornfully, echoing off endless caverns of
limestone.

As part of our acclaimed PBS documentary, "McKelviphibian; Creature from the
Black Lagoon", we took sensitive sound recording equipment into one of these
caves. Listen now, for a voice that sounds almost human:

When will mckelviphibians understand that despite their protestations, ABX
and
other double blind protocols are the standard way serious amphibians look
for differences in mating calls?