Almost 1000 species of bats occur world wide. Currently we have approximately 40 species represented on this site. We have constructed this site so that it is expandable to accommodate calls that are generated worldwide. We just don't know enough. Traditionally, difficulties in assessing the status of bats were due to the difficulty to detect bats by only netting.
Nets miss sampling both individuals and species of bats.
Harp traps are effective in some situations, but still there is a strong bias from knowing the true picture of diversity. This website will provide a complete and accurate sound catalog of calls emitted from positively identified bat species. It should be useful in answering the larger scale questions and begin comparisons among and between regions for examinations of geographic variation and individual recognition within and between species.