The space in which the drones were flying had distinct borders demarcated horizontally and vertically by the canopies of trees: the area was c10×6 m and the height of flight was 4-8 m. -from Authors
CITATION STYLE
Punchihewa, R. W. K., Koeniger, N., & Koeniger, G. (1990). Congregation of Apis cerana indica Fabricius 1798 drones in the canopy of trees in Sri Lanka. Apidologie, 21(3), 201–208. https://doi.org/10.1051/apido:19900305
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