El Hornero
Vol. 2 No. 3 (1921)

Notes Published 01 August 1921 https://doi.org/10.56178/eh.v2i3.91

Do swallows migrate or hibernate in the winter?

SwallowsProgne furcataPetrochelidon pyrrhonotaEmigrationLethargy
Alberto Castellanos

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Alberto Castellanos (1921). Do swallows migrate or hibernate in the winter?. El Hornero, Vol. 2 No. 3 (1921), 228. https://doi.org/10.56178/eh.v2i3.91

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