iNaturalist: Guam CRB Citizen Science

The Guam Coconut Rhino Beetle Citizen Science Project (CRB-CS) is currently in a very early stage of development.


Roland Quitugua and Aubrey Moore at the University of Guam Cooperative Extension Service have developed a rhino beetle trap that catches more than ten times as many beetles as pheromone traps currently in use. They think it is possible that placing a few of these traps in a neighborhood will catch enough beetles to reduce damage to palms to an acceptable level and looking for volunteer citizen scientists to help with their research.

The essential idea behind the CRB-CS is to recruit volunteers from the public to help with this trapping effort. We are looking for volunteers who are interested in checking one or more traps in their neighborhood on a daily basis. We are planning to use our iNaturalist project site as data entry tool which  volunteers can use to report the numbers of beetles caught in the trap or traps they are monitoring. Citizen scientists will be asked to check traps on a daily basis and to add observations to the iNaturalist project database whenever beetles are trapped.

Setting Up and Operating a Rhino Beetle Trap

Information to be added.

Using iNaturalist

Sign up for an iNaturalist account. This is totally free. You should set your default time zone to (GMT+10:00) Guam.

Initial Steps

Video: Little Fire Ant in Hawaii

Here is a video on how the little fire ant is affecting Hawaii. This ant species was detected on Guam in November 2011.

Relative Attractiveness of White and Ultraviolet Light Emmitting Diodes for Rhino Beetles

Rhino beetles are not color blind. They prefer UV LEDs over white ones. See attached.

Arnold Hara's Rhino Beetle Images Taken During his Trip to Guam

Dr. Arnold Hara, an entomologist from the University of Hawaii in Hilo visited Guam during September 2013 to learn about the coconut rhinoceros beetle. He has very kindly shared a presentation he put together using images from this trip. Please see attached files.

No Rhino Pamphlet

The latest version of the No Rhino trifold pamphlet is attached to this post as a PDF file.

Y-tube bioassay with beta-Phellandrene

This experiment was set up after dark, approximately 6 pm, when the beetles are most active.

50ul of beta-Phellandrene were put inside of a heat-sealed plastic straw, with two holes poked into the straw for release of chemical.

The air was set at 3.5 liters per minute. If the CRB did not make a decision at 2 minutes, that subject was taken out of the tube.

20 CRB were used:

1) Jar# 0930, female: at 1:54 min --> air

2) #1471, male: at 2:09 min --> lure

3) # 0154, female: at 4:17 min --> lure

4) # 1349, male: at 15 sec --> air

5) # 0772, male: at 3:21 min -->air

6)# 1172, male: at 17 sec --> air

7)# 0313, male: at 2 min no decision

8) # 0396, female: at 45 sec --> air

9)#1242, male: at 4:12 min --> air

10) # 1434, female: at 5 min --> lure

Cleaned y-tube with Acetone, switched lure sides

11) #1230, female: at 2:18 min -->air

12) # 1282, female: at 2:43 min --> air

13) # 0250, male: at 2:20 min --> air

14) # 1539, male: at 2:20 min --> lure

15) #1226, female: at 2:16 min --> air

16)#1227, female: at 2 min no decision

17) # 1234, male: at 2 min no decision

18) # 1241, female: at 55 sec --> lure

19) #0705, female: at 1:24 min --> air

20)# 0050, female: at 3:30 min --air

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