Our Hybrid Tag now comes in various leg band configurations. The standard configuration utilizes a sliding locking door that requires no glue for deployment. The Hybrid Tag is embedded in epoxy within the main tag, and the antenna is embedded within the tag walls, meaning no external whip antenna to get in the way. We are making these leg bands in sizes 5 and up (based on the USGS Bird Banding Lab dimensions https://www.pwrc.usgs.gov/bbl/manual/sizes.cfm). If you require a band size other than what is available in the dropdown please choose "other" and let us know the size via email (please do not request band sizes less than 5 as it is not currently possible).