Jonathan T Wojack wrote: > At 10 degrees elevation, this is 668.5 meters in altitude. At 45 > degrees, 2.72 km in altitude, and at 60 degrees, 3.33 km. I think these > altitudes are too high for a small bird. What about a larger bird? I've seen very small birds, swifts I think, as well as much larger ones (seagulls, kites, etc) at cloud base around 1 to 1.5 km altitude in southern England. I imagine they'd go to cloudbase whatever it was locally if that's where the insects were. Whether the small birds would do it at night is another question - if there isn't the convection to carry the insects. Perhaps during migration? Ed. ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Sat Jan 27 2001 - 05:37:25 PST