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Fig. 2. Male túngara and background spectral reflectance. (A) Average
spectral reflectance of body regions from 15 male túngaras (solid
lines) including head (+), dorsal (
), ventral (
), non-inflated
vocal sac () and inflated vocal sac (
). Average background material
spectral reflectance is also shown (broken lines) including mud (),
stone (
) and dead leaves (
). (B) Average spectral reflectance of
the vocal sac of a representative male túngara frog in non-inflated
() and inflated (
) states. Mean ± s.e.m. reflectance data
include replicates made in left, middle and right areas of the vocal sac.