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Migration Rate Math
Who saw the strongest migration this week?
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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.