Overwintering Monarch Population 2007-2008
7 February 2008 | Author: JimIt’s official - the monarch population numbers are low again. Measured at 4.61 hectares, this year’s overwintering population is the third lowest since detailed measures of all overwintering colonies began in 1993. The three lowest populations in this 15-year record ...
Filed under Monarch Population Status | Comments Off on Overwintering Monarch Population 2007-2008
Monarch Population Status
7 January 2008 | Author: JimThe monarch population in the eastern part of the breeding range was higher than normal for the second year in a row. Although the 2007 fall migration was smaller than normal in the upper mid-west, perhaps due to a mid ...
Filed under Monarch Population Status | 3 Comments »
Late Migrants and Population Size
2 November 2001 | Author: JimAlthough 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 ...
Filed under Monarch Migration, Monarch Population Status | Comments Off on Late Migrants and Population Size
The Great Recovery of 2001
9 October 2001 | Author: Chip TaylorLast year was a disaster for monarchs. The spring, summer, and fall droughts in different portions of the country limited reproduction in the spring and summer and survival of the migrating population in the fall. The result was the lowest ...
Filed under Monarch Population Status | Comments Off on The Great Recovery of 2001
Fall Monarch Population and Migration
17 August 2001 | Author: JimAlthough 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, ...
Filed under Monarch Migration, Monarch Population Status | Comments Off on Fall Monarch Population and Migration
Monarch Population Down?
6 June 2001 | Author: JimThe overwintering monarch population in Mexico was the lowest (2.83 hectares) yet recorded by Eligio Garcia for all overwintering colonies combined. If we use the number of monarchs per hectare suggested by Bill Calvert at the recent meeting in Lawrence ...
Filed under Monarch Population Status | Comments Off on Monarch Population Down?
