Trends Observed in Fall Migrant Monarch Butterflies (Lepid

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APA

Milkweed USA. (2026). Trends Observed in Fall Migrant Monarch Butterflies (Lepidoptera: Nymphalidae) East of the Appalachian Mountains at an Inland Stopover in Southern Pennsylvania over an Eighteen Year Period (listing). Retrieved DATE, from https://milkweedusa.com/research/trends-observed-in-fall-migrant-monarch-butterflies-lepidoptera-nymphalidae-2015/

MLA

"Trends Observed in Fall Migrant Monarch Butterflies (Lepidoptera: Nymphalidae) East of the Appalachian Mountains at an Inland Stopover in Southern Pennsylvania over an Eighteen Year Period (listing)." Milkweed USA, 2026, https://milkweedusa.com/research/trends-observed-in-fall-migrant-monarch-butterflies-lepidoptera-nymphalidae-2015/. Accessed DATE.

Chicago

Milkweed USA. "Trends Observed in Fall Migrant Monarch Butterflies (Lepidoptera: Nymphalidae) East of the Appalachian Mountains at an Inland Stopover in Southern Pennsylvania over an Eighteen Year Period (listing)." Last modified 2026-08-01. Accessed DATE. https://milkweedusa.com/research/trends-observed-in-fall-migrant-monarch-butterflies-lepidoptera-nymphalidae-2015/.

BibTeX

@misc{milkweedusa_researchtrendsobservedinfall,
  title  = {Trends Observed in Fall Migrant Monarch Butterflies (Lepidoptera: Nymphalidae) East of the Appalachian Mountains at an Inland Stopover in Southern Pennsylvania over an Eighteen Year Period (listing)},
  author = {{Milkweed USA}},
  year   = {2026},
  url    = {https://milkweedusa.com/research/trends-observed-in-fall-migrant-monarch-butterflies-lepidoptera-nymphalidae-2015/},
  note   = {Accessed DATE}
}