2007: Unusual Migration & Hotter Than Normal Fall

18 January 2008 | Author: Monarch Watch

Tagging has shown that the timing and pace of the migration is generally quite predictable (see "Peak Migration Dates"). The pace of the migration was normal this year as the butterflies advanced from 50 degrees latitude in the north to ...

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Where Are They Now/Late Monarchs

3 December 2001 | Author: Monarch Watch

We have been told over the years that the last of the monarchs that overwinter in Mexico arrive at the colony sites during the first week of December. This may in fact be the case. However, as I sat down ...

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Late Migrants and Population Size

2 November 2001 | Author: Monarch Watch

Although there have been killing frosts over much of the northern portion of the breeding range, late monarchs have been reported with some regularity over the past two weeks and, as recently as yesterday (1 November), two monarchs were spotted ...

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Where Are They Now?

2 November 2001 | Author: Monarch Watch

The leading edge of the migration seems to have arrived near the overwintering sites in Mexico a bit early this year. Reports on Dplex-L, the email list we maintain for those wishing to post reports on monarchs, indicated that monarchs ...

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Where are they now?

9 October 2001 | Author: Monarch Watch

The migration is right on schedule. At this writing (9 October) there appear to be monarchs in good numbers in a broad band from southern Oklahoma to the Mexican border. High concentrations of monarchs have been seen in the vicinity ...

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Migration Forecast

10 September 2001 | Author: Monarch Watch

The leading edge of the migration is expected to progress southward from approximately 39 degrees N on the 10th to 36:50 on the 17th. The migration is expected to peak approximately 10 days after the arrival of the front at ...

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Fall Monarch Population and Migration

17 August 2001 | Author: Monarch Watch

Although the number of monarchs at the overwintering sites in Mexico last winter was the lowest yet to be recorded (28.3 million) and the number of females that survived to reproduce this spring in the southern states was quite low, ...

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