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On the night of 23-24 July 2002 around midnight single
Swifts (Apus apus) were observed for several seconds flying roughly
1000-2000 meters high in front of the almost full moon. Their flight was
absolutely smooth without any observable wingbeat and the main wind was blowing
from the west. One swift was flying north-west and another, which was observed
10 minutes later, was flying south-west. The estimated flight speed was rather
low at about 25 km/h. The observation time was about 15 minutes.
Equipment: Powerful binoculars (15x with
80mm front lenses) on a tripod. Place of observation: Skies over Neustadt/Weinstraße,
south-west Germany.
e-mail
mg@martingrund.de |
