Fig 2 -

• Main Authors: Mason D. Ryckman (11973418), Kaylan Kemink (11973421), Christopher J. Felege (5017649), Brian Darby (3321585), Gregory S. Vandeberg (7182647), Susan N. Ellis-Felege (3310083)
• Format: Still Image
• Language: unknown
• Published: 2022
• Subjects: Neuroscience; Biotechnology; Ecology; Developmental Biology; Inorganic Chemistry; unmanned aerial vehicles; swimming ); resting; spatula discors </; spatula clypeata </; observed marked differences; gopro camera affixed; g .; feeding; found launch distance; conducted 42 paired; 4 %) flush; 27 may 2020; shovelers increased proportion; recorded duck behaviors; whether ducks swam; ducks appear aware; northern shovelers (<; div >< p; winged teal (<; shovelers became; winged teal; vigilant behaviors; northern shoveler; ducks flushed; spotting scope; specific activities; respectively ); overhead vigilance; less known; inaccurate counts; important predictor; examine flushing; despite similarities; could result; behavioral responses; 30 minutes; 24 april; Northern Shoveler; Shoveler
• Online Access: https://doi.org/10.1371/journal.pone.0262393.g002

Least square means and 95% confidence intervals of proportion of time spent on vigilant behavior for blue-winged teal (A) and northern shoveler (B) within treatments groups (Flown vs. Control). This behavior consisted of the ducks fully extending their head away from the body to scan for intruders.