Migration
Rate Math
Who saw the strongest migration this week?
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to Introduction)
Week
Ending October 19, 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.
10/18/107
Early, TX (31 N, -99 W)
My kindergarten class sighted groups of monarchs as we walked to lunch.
Approximately 30 monarchs were sighted during a five minute walk.
10/14/107
Saltillo, Coahuila (25 N, -101 O)
El domingo 14 de octubre, tuve la oportunidad de ver mis primeras mariposas
monarcas del año, en la zona de Lomas de Lourdes a las 12 del día
con una temperatura de 22 grados, las mariposas volaban muy bajo y se
posaban en flores por segundos y emprendían el vuelo, conté
4 a 5 por minuto. .
10/16/107
Justin, TX (33 N, -97 W)
Saw 112 Monarchs in about an hour. Weather in Justin is very overcast
with only occasional patches of blue sky and sun, with temperatures in
the high 60s during the time of sightings. Most Monarchs were flying within
20-25 feet of the ground moving in a mostly straight direction. Saw a
number of them near my house flying high and circling my yard. I'm hoping
that they visit my butterfly garden. There is plenty of milkweed and other
flowers blooming.
10/15/107
DeLeon, TX (32 N, -99 W)
Monarchs are coming through this evening at a rate of over 25/min—almost
too many for the 4 of us to count. They are very large and FAT... There
are so many and they are so fat that they look like a bird migration...
It was incredible! They are flying in a North to South path at a rapid
pace. They are not stopping or slowing down. I observed from 6 pm CST
to 7 pm CST and they never slowed down or thinned out.
10/15/107
Nashville, TN (36 N, -86 W)
Well, it's not the thousands they are seeing in Texas, but it was pretty
exciting for Tn. I counted 10 on the 8 mile trip home from school on Thursday;
(Assume the driver was going 30 mph.)
10/15/107
Ponca City, OK (36 N, -97 W)
After the passing of this latest cold front, today yielded 12 Monarchs
in 15 minutes this afternoon. Otherwise throughout the day, I had not
seen any at all. That's a very curious thing to me. They were flying at
a height from 10-40 feet. The temp here when I observed these late-season
Monarchs was 62 degrees. We had a very light northerly breeze.
10/14/107 Hurlburt Field, FL (30 N, -87 W)
We counted about 10 monarchs which reminded me that it is about the time
of year to start seeing them. We spent aprox 5 min counting. The time
was about 3pm central time wind maybe 12mph and they were flying in a
definite westerly path. We live right on the coast. I did read that once
they reach the coast that they follow the coast line. I had always wondered
how it was that they made it to Mexico and thought there was no way they
could fly over the gulf. We live near Pensacola and there is one section
along the coast in Gulf Breeze (town outside of Pensacola) that has a
5 mile bridge. At this point if you were to stay in Gulf Breeze you could
not go any farther west. You would have to take this bridge to go through
Pensacola and on into Mobile. It was amazing last year to see all the
butterflies actually crossing by bridge. They literally follow the coast
line. Trying to count them was impossible. It was easily in the hundreds.
10/13/107
Ozona, TX (30 N, -101 W)
I headed W to Ozona. [Ozona is 100 miles SE of Midland.] At 5:30 p.m.
in Ozona the winds had picked up and were gusting to 20 mph.
I counted 7 monarchs in 10 minutes under the huge pecan trees that make
up all of the SE quadrant of town. Then after supper I cruised the east
half of town and hit upon an arroyo with a good wind sac containing an
early cluster of between 50 and 80 monarchs. The rest of town I picked
up another 10 or so drifting beneath the trees.
10/13/107
Sea Girt, NJ (40 N, -74 W)
Saw a monarch, so decided to take 5 minutes to count - saw 6
- all going south no more than 25 feet above ground. This was about 11:30
am. Seemed to be as consistent for 3-4 hours.
10/13/107
Long Beach Township, Long Beach Island, NJ (38 N, -74 W)
I stopped counting at over 200 Monarchs on Long Beach Island as I drove
from Ship Bottom south towards the southernmost tip of Long Beach Island
They are everywhere! (Note: This distance is about 8 miles and about a
15 minute drive.)
10/13/107
Cape May, NJ (38 N, -74 W)
Drove down to Cape May from Jackson, NJ this morning. Saw many monarchs
moving South and many more seemed to be moving SW. In Cape May, the monarchs
were abundant; counted 48 in 10 minutes landing in my rear garden. Checked
out the roosts at sunset; I found several fairly large roosts throughout
the point. I'm not good on number estimates but would say 200-300 monarchs
at several sites and many smaller clusters widely dispersed.
10/13/107
Panama City Beach, FL (33 N, -97 W)30.1764 -85.8056
Since posting last, in early Oct 07, a cold front has come through Panama
City Beach, Florida. ~48hrs ago, (10/12)at night, the temperature dropped
considerably approximately the low 60's F. Since then (10/13-14)monarch
spotting has become 'too' easy. Prior to the cold front - during peak
flying times - 10-2pm - one could see a monarch every 5 minutes. Since
the cold front, a monarch can be seen almost every minute. Still flying
southeast along the coast, if not single then in pairs, at about 3-10ft
above the ground. The northern style monarch has become much more frequent.Questions:
10/12/107 Carolina Beach, NC (33 N, -97 W)
We observed aproximatly 30-40 Monarchs flying west over the water towards
land midday. We observed the Monarchs over a period of 30 minutes Wind
was light; clear and sunny: temperature was 80 degrees F. Tide was near
low. Did not see any dead Monarchs or observe any predator interruption.
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