Enjoying Moths by Leverton Roy

Author:Leverton, Roy [Leverton, Roy]
Language: eng
Format: epub
Publisher: A&C Black Non-Trade
Published: 2010-01-31T00:00:00+00:00

In practice, the British weather makes it impossible, or at least pointless, to run a moth trap on a sizeable proportion of nights – it might be too cool, too clear, too windy or too wet. Temperature is by far and away the most important factor: the warmer the night, the more active moths will be. It is mainly when the temperature is on the low side (under 10°C) that the other factors come into play. Geometrids in particular do not like wind, but will fly in surprisingly cool conditions if it is calm. Spring and late autumn moths are necessarily more tolerant of low temperatures than summer ones, but even for these 5°C can be regarded as the minimum. However, predicting whether it will be a good night for moths is more of an art than a science. Partly this is because the night must be considered in the context of the previous ones. If moths have been forced to sit out a long spell of poor weather, they will fly once conditions improve even moderately. However, an identical night that represents a deterioration after a spell of good weather is likely to be poor.

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