[pbs] color preferences of birds and insects
Adam Fikso
adam14113 at ameritech.net
Thu Oct 5 13:01:21 EDT 2006
Ken, I note that you are a good observer. Nectar quantity is a major
consideration. One of the problems with big tubular red flowers is that they
may have already been emptied by previous visitors, or, already checked by
the hummingbird you were watching, or the nectar production is temperature
and time of day related. S/he may have known already that there was nothing
in there any more. Why go to a bottle that's been emptied ?
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