Figure 1. Frequency of observation and reproductive success of four chorus size classes.

Mean number of Houston toad (Bufo houstonensis) males attending choruses calculated from nights on which at least one male was heard calling (CHOR, grey bars) and number of ponds exhibiting evidence of reproduction (black bars) for four chorus size classes. Proportion of ponds with evidence of reproduction goes up as CHOR increases, with all ponds in the largest size class having evidence for reproduction.