Here are a few sound clips to test your identification abilities:
Identify species calling:
Highlight for answers: 1. Green Frog 2. American Bullfrog
Identifying the calling index is also part of the data collection and will give us a rough estimate of population size at each site. Identify the calling index for both Bullfrog and Green Frog according to chart below:
| Amphibian Calling Index | |
| 1- Individuals can be counted; spaced calls | |
| 2- Individual call can be distinguished, but there is overlapping | |
| 3- Full chorus, calls are constant, continuous and overlapping |
Highlight for answers: 3. Green frog (3), Bullfrog (1) 4. Green frog (2-3), Bullfrog (1-2)
Sound clip sources:
http://www.californiaherps.com/noncal/misc/miscfrogs/pages/l.clamitans.sounds.html
http://www.californiaherps.com/frogs/pages/l.catesbeianus.sounds.html
