Araba Bioscan

Araba Bioscan 18-25 December 2020

Data for the period 18-25 December 2020

See the Araba Bioscan Project page for background information on the project and methods.


One of the flies captured this week seems to have been parasitised by a nematode or other “worm” that has apparently hollowed out at least the interior of each compound eye. The fly had no wings remaining and the head was rotated through 180°. Finding information on parasites of insect eyes is very difficult since searches repeatedly return pages on insect parasites of human and animal eyes. Any information on clades that destroy the eyes of flies would be welcome. I assume that the parasite also controlled the fly’s behaviour to climb upward (and fall into the sampling bottle) despite being so badly compromised.

Sample images

Sample for 18-25 December 2020
Araba Bioscan 2020-12-25

Environmental measurements

Sunrise and sunset sourced from Sunrise-Sunset and relate to the listed date. All other measurements are calculated for the 24-hour period to 09:00.

Date19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25 Dec
Mean temperature (°C)21.217.321.416.615.419.020.5
Max temperature (°C)
Min temperature (°C)12.812.114.312.28.610.913.4
Mean humidity (%)55.071.552.579.365.963.258.8
Max humidity (%)
Min humidity (%)
Mean soil moisture (%)28.826.425.242.442.533.529.1
Max soil moisture (%)
Min soil moisture (%)
Mean relative pressure (hPa)1013.81017.01014.11008.81009.71017.41017.6
Max relative pressure (hPa)1018.51018.71016.51014.61016.41018.91020.7
Min relative pressure (hPa)1009.91015.21011.91004.01005.51016.01014.6
Mean absolute pressure (hPa)936.4939.6936.7931.4932.3940.0940.2
Max absolute pressure (hPa)941.1941.3939.1937.2939.0941.5943.3
Min absolute pressure (hPa)932.5937.8934.5926.6928.1938.6937.2
Daily rainfall (mm)
Sunshine hours10.
Max solar radiation (W/m2)999.5960.3905.3259.41009.21047.2999.5
Max UV index99829109
Mean wind speed (km/h)
Mean wind direction317.4135.4325.4316.1324.1327.0319.9
Max gust (km/h)

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