Carol, are the monarchs in Eagle Pass today flying
at low to medium heights since the wind is so
strong (25-35 MPH) out of the NNW?

Or are the monarchs flying so high you need to
use binoculars to see most of them?

Or is the wind so strong many of the migrants
are preferring to cluster in trees out of the wind
instead of migrating?

During the last 10-60 minutes before sunset today, may I
suggest you check a wide range of potential evening
cluster sites including hilltop groves of pecan and oak trees.
During N winds when temps are below about 75 degrees
near sunset it is routine to see fall migrants
selecting cluster trees on or near hilltops and ridgetops.

Also, during N winds, sometimes the fall migrants
don't drop out of migration until the last 20 minutes
before sunset and then the clusters form abruptly
and spectacularly.  So in a matter of minutes the
situation can change from seeing few migrants to
suddenly seeing thousands.

Paul