Raising Book Resources
Raising Hope for the 2021 Monarch Migration- Raise The Migration Results
Raise The Migration is an annual North American challenge to raise monarch butterflies to release for fall’s annual monarch migration. The time has come to share your 2021 experience and raise it forward…
The raising season is coming to an end, so we’d love to hear how many butterflies you released for fall’s annual 2021 monarch migration…and more importantly, what lessons you’ve learned through this amazing raising experience?
If you’ve still got some raising to do, raise on! But please post in the comment box at the bottom of this page after you’ve released your last butterfly.
Every year, I start Raise The Migration in July, but monarchs raised at that time aren’t actually migration generation butterflies…they’re the parents to that amazing generation of travelers.
There’s no way to tell whether butterflies will mate or migrate, but one telltale sign of a migration generation butterfly is its size, which is dependent on how much the caterpillar eats. The first super-sized caterpillars start to form chrysalides around the first week of September in our northern region…
In the garden, you can tell non-migratory butterflies by their worn out wings. Non-migratory males are also more aggressive, chasing off potential competition while seeking out female companionship…migratory monarchs are in sexual diapause and only interested in stocking up on nectar for the long journey ahead.
So how did our Raise The Migration Monarchs fare this season and what lessons did we learn raising forward?
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If you’re interested in a step-by-step guide digital guide with free updates (before each monarch season begins in spring) please check out the monarch raising guide by clicking this butterfly photo:
For anyone who purchases the guide (or any other item) from Monarch Butterfly Life, you will be invited to our closed facebook group where you can discuss raising monarchs with other raisers and post your photos.
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Here are Raise the Migration results from the past eight seasons:
2020- 82% survival rate
2019- 81% survival rate
2018- 93% survival rate
2017- 100% survival rate
2016- 96% survial rate
2015- 96% survival rate
2014- 90% survival rate
2013- 100% survival rate
As you can see from the results, this raising system is consistently producing healthy monarchs to help support the struggling monarch population.
Raise The Migration 2021 Results
I released 15 healthy monarchs (14 females and 1 male) from July 29th to August 16th with a 100% survival rate. I am fairly certain all of these butterflies were parents to the migration generation.
The seven monarchs we raised after that, were counted as our official Raise The Migration monarchs for 2021...
Caterpillar Escapes
By keeping monarch eggs and baby caterpillars in sealed food containers, and raising larger caterpillars in the mesh cages, we never lose caterpillars.
I think the closest we have come was two years ago when I forgot to close a cage door and found a caterpillar crawling on top of the cage. 🐛 😱
Unexplained Caterpillar Deaths
We didn't have any unexplained monarch deaths in 2021.
Caterpillar Diseases and Parasites?
I'm happy to report no disease issues in 2021. All of our raise the migration participants were brought in as eggs so no issues with tachinid flies...a couple eggs were parasitized by trichogramma wasps, and we discarded those eggs when they darkened and never hatched.
Accidental Deaths?
We experienced one accidental (and completely preventable) accidental death. See the Butterfly Eclosure section below for more details...
Chrysalis Problems
No chrysalis issues to report in 2021...
Community member Jude R. recently used the microfiber method to rehang one of her fallen chrysalides:
Jude reports: There was zero silk and I wasn't sure what to do. Your tip worked and just in time. I was a little worried the bfly's feet would get stuck in the microfiber, but it had zero problems.
Butterfly Eclosures
We had one eclosure disaster this year. An early morning butterfly (emerged from chrysalis before 7am) fell from our kitchen overhang on to the floor.
She lost a lot of fluids from her abdomen when this happened. Her wings recovered 'somewhat' when I hung her from inside a mesh cage, but she was injured badly from the fall on to the wood floor, which is about a 7 foot drop.
Starting in 2022, we will no longer rehang chrysalides on our overhang. It's much safer to rehang them inside the cage where they can crawl up a mesh wall after falling a much shorter distance.
Final Results
Our totals are from all eggs that have successfully hatched. We don't count eggs that were parasitized outside or monarchs brought in as caterpillars because they could have parasites too.
Seven monarch butterflies emerged from their chrysalides between August 29th and October 5th:
1 accidental death (butterfly fall)
0 disease or parasite issues
0 unexplained deaths
4 healthy males
2 healthy females
86% survival rate
Lessons Learned?
Chrysalides should always be kept in a cage or somewhere where the butterfly has a chance to climb to safety if it falls after it emerges. In my experience butterflies rarely fall, but it can happen.
Migration Memory 2021
I came across these mating monarchs in our Minnesota garden on September 19th when it was an unseasonable 90°:
Before 2021, I had never seen mating past the first week of September in our region.
I hope you enjoyed reading about my Raise The Migration '21 results and lessons learned raising monarchs through the butterfly life cycle .
And now, I'd love to hear about your experience...
Share Your Results?! ✍️
Please share your results below by letting us know how many monarchs you released to help boost the struggling monarch population…remember to include your location.
More importantly, please share the most valuable lesson(s) you learned about raising monarch butterflies, that you believe can help others raising forward.
Thank you for helping to Raise the Migration in 2021
338 comments
We released our last Monarch on October 2. Beginning on July 26, over the entire summer, our release count was 470, with a slight edge to females, 242 to 228 for the males. Depending on when one counts the migration generation, we counted 221 after August 15, and 161 after September 1. Our overall survival rate was a disappointing 67%, comparing total eggs and small caterpillars (only 4% of total) versus released butterflies. Eggs that did not hatch amounted to 16% of those collected. A number of cats began to show stress (spewing green fluid) at various stages of growth and accounted for another 15% of losses. This may have come about by overcrowding. Finally, like Tony’s report of a fallen enclosure, we lost a number that could not seem to hold on to the chrysalis resulting in crumpled wings before we could rescue them and an inability to fly. Fortunately we solved that problem before getting too far into the migratory generation. We also had a few chrysalides turn black, but only one showed the effect of a tachinid parasite.
Tony, thanks for all that you do for the Monarch community.
I raised 11 Monarchs (2 males/ 9 females) this year, all from eggs from the milkweeds that I had overwintered using plastic jugs and following your instructions during the 2019/2020 winter. In 2020, had only 1 Monarch, raised from a large cat found in Aug. The three different types (swamp, common and showy) were all healthy this year and provided plenty of food for the cats. Noticed many more butterflies in the garden this year and enjoyed every one of them!!
Had only one
Western Upper Peninsula of Michigan. Through a joint cooperative effort, successfully released 450 Monarches from June-September 2021.
I live in South Carolina zone 8 for four years. This is the first year I have had a somewhat successful monarch year. I brought 13 caterpillars into my cage netting. Everyone started out fine and made there crystalis and emerged nicely and beautiful. But 3 of my caterpillars were not so successful. The first one started to “J” up and it looked like it was starting to make its crystalis but stopped. It just hung there even until the next morning. So it died. The next two caterpillars made there crystalis. All looked good until they emerged. They both had crinkly, deformed wings. As they dried, the wings never straightened out. So of course they would never fly. ( not a good situation for a monarch butterfly to make its migration) . I did some research about the causes for deformed wings. One big culprit is the one celled parasite (OE abbreviation for two long words that I can’t even pronounce.). Can you please give me your suggestions that you feel is best to get rid of this parisite and help me raise a more healthy season for next years monarchs!!
Thank you for any suggestions.
I raised 25 out of 26 Monarchs! I had 1 chrysalis turn brown and it was discarded. From Westchester County, NY.