Migration
Rate Math
Who saw the strongest migration this week?
(Back
to Introduction)
Week
Ending October
26, 2007
Here are a few of this week's observations. Read the comments and calculate
the migration rate for each.
Record this fall's most impressive observations on your Record
Sheet and add your favorites to your own Migration
Highlights Map.
10/24/07
Victoria, TX
While driving in
my car on the main street in Victoria I began to notice a number of
Monarch butterflies flying overhead at about the level of the powerlines.
Approximately every 5-10 seconds, while driving at 40 mph one or two
monarchs would cross over the car. They all moved at about the same
level and all flew in the same direction, seemingly with a purpose as
they only moved in straight lines. Over the course of that day and the
following I noticed them everywhere I went. They typically seemed to
fly alone, although on occassion two could be observed moving together.
10/24/07
Port Lavaca Causeway, TX
My
wife Altus said there were more monarchs than she had ever seen. Fantastic
numbers between 2-4 pm falling out in the area. I started out across
the causeway when I went back and counted 89 monarchs coming at me in
the first mile and
then just quit counting.
10/23/07
Arlington, TX
I have spotted the monarchs for a week or so from my office, but today
I have seen on the average of 360 an hour.
10/23/07
Mineral Wells , TX
Today the wind was blowing NW 8 mph and Ms. Stringer's class observed
41 monarchs in a 20 minute time period. The butterflies
were flying and gliding without stopping. The early morning temperature
was the coolest this fall at 49 degrees F. The temperature during the
sighting was 67 degrees F. The size of the monarchs was a mixture of large
to small.
10/23/07
Lytle , TX
We saw hundreds of monarchs here today: around nine this morning warming
up on the sunny side of the live oaks they were roosting in, passing our
house this afternoon at a rate of about 25 per hour, then by the hundreds
in the live oak groves at roost time. The most we have seen in several
years.
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