Moth and Bat night

Here are the Anabat recording results from Earlswood Lakes (SP1073 & SP1074) Saturday 3rd September 2011, 8.45pm to 10.51pm:

Soprano Pipistrelle Pipistrellus pygmaeus = 293 sonograms

Common Pipistrelle Pipistrellus pipistrellus = 77 sonograms

50khz Pip (Com or Sop) = 138 sonograms

Nathusius Pipistrelle Pipistrellus nathusii = 2 sonograms (peak frequency 40.3khz and 40.0khz)(needs validation)

Noctule Nyctalus noctula = 4 sonograms

Daubenton’s Bat Myotis daubentonii = 21 sonograms (Probable, but with good observations to support)

Myotis spp = 11 sonograms

Brown Long-eared Bat Plecotus auritus = 1 sonograms

I challenge anyone to find a more active site for Soprano Pipistrelles! And the possible Nathusius! I recorded a pip here last year at 40khz too, I believe that common pips only get down to 41khz? The foraging is that good over the water bodies here that I am not surprised that a Nathusius might be tempted to make this a stopping point, we will have to scrutinise all the Pips found in any of the bat boxes now.

There were also larger Myotis flying across the main causeway but I have not picked up enough recordings to have been able to pin them down to a species, there was nothing this time to suggest Natterers, but we missed most of the woodland out this time.

Regards,

Paul Wilkinson (06/09/2011)