Results: In Almonds and Corals, collection was made at about noon with high temperature and humidity, without rain. The approximate elevation was 2 meters above sea level. The species count was: 2 small red ants, 4 sting less wasps, 3 large red and tan ants, 1 centipede, 1 black spider, 1 black beetle, 2 grubs, 4 fruit flies (variable because flies can fly). A total of 8 species were collected with a total of 18 individual arthropods in the sample.

Fig. 1: A graphic representation of the species collected at Almonds and Corals.


The Drake Bay sample was taken from a disturbed area at 5:00pm after heavy rain. The approximate elevation was 4 meters above sea level and the temperature was in the low 80’s. Species count was: 15-11 fruit flies (some flew away during sample analysis), 4 beetles, 7 black ants, and one black spider. There were a total of 4 species represented with a total of 27 to 23 organisms collected.

Fig. 2: Species composition of the sample collected at Drake Bay Fruit flies account for more than half of the total sample.



San Pedrillo sampling occurred at 11:00am the day after very heavy rainfall. Conditions at the time of collection were sunny hot and humid and the elevation was approximately 200m. The species count was: 31 termites, 3 unidentified mites, 1 black ant and one very small spider. There are 4 total species represented in this sample with a total of 36 organisms collected.


Fig. 3: Composition of the sample collected at San Pedrillo. The sample is nearly entirely composed of termites.


La Selva observations were not aggressively made, and the only insects that were observed were mosquitoes. There were multiple species of mosquito observed and they were very plentiful, but since none were collected there is no data to suggest how many species were encountered. No ground samples were taken because of very heavy rains that prevented collection.




Sample Collection Results

Location Species Count Total Collected Insects
Almonds and Corals 8 18
Drake Bay 4 27-23*
San Pedrillo 4 36

Table 1: Summary of data obtained from ground sampling. * indicates that some species were capable of flight and may have flown away during the sample analysis.


Monteverde sampling did not occur due to poor time planning by the research team, and a lack of time. Many insect observations were made, however, both at day and night. Day time observations were primarily of mosquito and butterfly species with about 4 species accounted for. Hundreds of species of insect were observed during the night time. These insects were attracted to the lights outside of the lodging, and thusly cannot be considered to be a random sampling.


Arenal Lava flats did not appear to be home to any insects whatsoever. Not a single sighting of an insect occurred while either of the researchers was in the area. The area was very devoid of plant life and no sources of water were visible.


The mountain bog was very similar to the Arenal lava flats. However, one species of spider was observed in the bog. The species of spider was the only arthropod that was observed, but there were many individuals. In fact, almost anywhere observations were made, at least 5 or 10 of the spiders could be found hiding in the grass or moss. The temperature was in the 50’s and the ground water and peat were acidic. The altitude was nearly 8000ft. above sea level. Specialized plants dominated the flora in the area.


In the mountain brush-land there were no insects observed. The temperature was in the mid 50’s and there was no visible source for water. The plants in this area were highly specialized and the altitude was near 9000 feet above sea level.

Vegetation like this was predominant in the mountain reigons that were observed. In such high altitudes the atmosphere is considerably thinner than in lowland forests and standing water is less common.

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