Supplementary Information Accompanying: Birds versus bats: attack strategies of bat-hunting hawks, and the dilution effect of swarming Caroline H. Brighton1*, Lillias Zusi2, Kathryn McGowan2, Morgan Kinniry2, Laura N. Kloepper2*, Graham K. Taylor1 1Department of Zoology, University of Oxford, South Parks Road, Oxford, OX1 3PS, UK. 2Department of Biology, Saint Mary’s College, Notre Dame, IN 46556, USA. *Correspondence to:
[email protected] This file contains: Figures S1-S2 Tables S1-S3 Supplementary References supporting Table S1 Legend for Data S1 and Code S1 Legend for Movie S1 Data S1 and Code S1 implementing the statistical analysis have been uploaded as Supporting Information. Movie S1 has been uploaded to figshare: https://doi.org/10.6084/m9.figshare.11823393 Figure S1. Video frames showing examples of attacks on lone bats and the column. (A,B) Attacks on the column of bats, defined as an attack on one or more bats within a cohesive group of individuals all flying in the same general direction. (C-E) Attacks on a lone bat (circled red), defined as an attack on an individual that appeared to be flying at least 1m from the edge of the column, and typically in a different direction to the swarm. (F) If an attack occurred in a volume containing many bats, but with no coherent flight direction, then this was also categorised as an attack on a lone bat, rather than as an attack on the swarm. Figure S2 Video frames used to estimate the proportion of bats meeting the criteria for classification as lone bats.