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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

Steffy G. Annals of the Entomological Society of America, September 2015.

Go to the paper May need a subscription · doi:10.1093/aesa/sav046

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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} }