Diel Distribution of Humming Power, 2009
data from July 1 to October 31, 2009 are included. The humming intensity is seen to rise abruptly at about 8:00 PM lodal time, and to drop off at 6:00 AM.
Diel Distribution of Humming Power, 2010
Data from July 1 to October 31, 2010 are included. The humming pattern is rather different from that of 2009, mainly due to daytime humming observed in July, 2010, but not in July, 2009. It is speculated that this was a consequence of unusually cloudy skies during July 2010.