My love nest is bigger than his

Music frogs advertise burrows

source: New Scientist vol 212 no 2842, December 10 2011 p18

Male Emei music frogs, Babina daunchina, which live in central China, attract mates by singing about their burrows. Their calls from inside nests are longer and lower than normal calls. Their calls have been studied by Yezhing Tang and team from Chengdu's Chinese Academy of Sciences. The team played normal and nest calls to females, and discovered that more than 70% of the females approached the nest calls. Males of most species, apart from humans, tend not to advertise such resources, maybe because they could attract competitors who might take their resources.