What is an automated frog call data logger?
Automated frog call data loggers are recorders that can be programmed to operate for a specified duration at specified intervals (for example, one minute every hour) and over a specified period (for example, 18:00 until 06:00). They can operate remotely without maintenance for extended periods under most environmental conditions, including extreme heat, cold, rain, and snow. The automated frog call data logger described in this section is a conglomeration of stand-alone components, whereas the original design (Peterson and Dorcas 1992, 1994) required building several components on a printed circuit board or using an expensive commercial data logger to control the tape recorder. The literature regarding previous designs is helpful and should be reviewed not just for construction details but also for study design (see related literature). Why build an automated frog call data logger? Automated frog call data loggers produce an archivable record that can be analyzed or confirmed at a late
