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Monarch Rearing History | Larry Bogan's Website, <i style="font-family:arial;">Pages of Original Presentations and Information</i>

Monarch Rearing History

Year Arrival
Date
No.
Arrived
Comments Max #
in field
# released
or emerged
#
tagged
2005     Small milkweed patch 4m x 4 m
Field cut for hay - Monarchs first noted this year
  3  
2006     50 chrysalis seen on buildings
- Hay cutting in field stopped -field left wild
  ~ 200 wild  
2007     field not cut - milkweed went to seed   ~ 60 wild  
2008     First year of rearing Monarchs inside   27  
2009   1 No female Monarch this year   0  
2010     Rearing inside   30  
2011     Registered Monarch Way Station #5040   31  
2012   15 First Flight Display - Start tagging   40 25
2013 Sept. 1 No eggs or Monarchs - one seen Sept   0  
2014   4 Abundant eggs layed   70 25
2015   1 pair 2 tags discovered in Mexico   70 50
2016   2     131 (6 wild) 50
2017 July 5   28 187 50
2018 July 10 Peak numbers in the field late August 80 491 150
2019 mid-July 12 Peak numbers in the field late August 50 300 200
2020 Jun-Jul 3-6 Peak numbers in field early September  60 197 50
2021 Jun-Jul 3-6 Peak numbers in field early September 60 214 50
2022            

Note: The number wild in the field was counted semi-regularly by following the same path around the field. The number in column 5 is the maximum seen but the numbers were usually above 20 through out August and September. It is difficult to estimate the number that fed and emerged from the field during the year so no number is given. The numbers given in years 2006 and 2007 are guesses weighed by the activity seen.