How to locate and survey for coqui frogs
Locating and recording the location of coqui frogs in the evenings when the males are vocalizing is an important step for effective control. Surveys ensure you are applying citric acid solution in the correct location and helps reduce citric acid waste. Keeping records of your surveys will also help with understanding how the coqui populations change over time and if your control strategies are working. If you would like to perform a survey on someone else’s property please ask permission from the property owner prior to beginning.
When to survey?
Coqui frogs are most active from a little after sunset to just after midnight and be sure to account for the weather. Coqui love a little rain, go out during rain fall or just after it has rained, especially when the temperatures are above 70 degrees Fahrenheit. Coqui are less active and less vocal when temperatures are below 70 degrees Fahrenheit and during dry spells.
Quietly walk within 10 feet of the area where you suspect the coqui frog or frogs are located. The frogs can be senstive to sounds like whispering, crunching gravel, broken branches and to lights from flashlights or head lamps.
Practice your patience.
Be prepared to sit or stand for 15-30 minutes to listen for the coqui frog to start calling. During this time try not to make any noise or use any lights.
Call out to the frogs
If you don’t hear any frogs calling try whistling the 2 tone coqui call out to them. This can stimulate them to respond. If you can’t whistle you can use a recording of a coqui frog instead.
Keep as detailed a record as possible of the area surveyed. Please include the date and time of the survey, the weather conditions, description of the landscape in the area including the types of vegetation, proximity to landmarks and the number of frogs heard. If possible take a recording of the frog sound to use for verification at MISC. There are many smart phone apps that can be used for recording or you can use a tape recorder.
Mark the location
Once you have confirmed the location mark the spot with string, surveyor’s tape or something similar to be able to return to it or direct someone else to the spot. Coqui frogs frequently stay in the same area so this will help to find them again.
Share your results with MISC
Create a map of the location you surveyed and any confirmed coqui locations to share with MISC staff. This can be a hand drawn paper map of your property, a downloaded aerial photo from google earth of your property with hand drawn indicators or an online survey track. The MISC coqui crew uses the Android phone app Locus Map to create coqui frog surveys. Please contact email@example.com or 573-MISC for help with this process if needed.