Figure 3 | Scientific Reports

Figure 3

From: Invasive brown treesnakes (Boiga irregularis) move short distances and have small activity areas in a high prey environment

Figure 3

Three-dimensional activity volumes (3D Kernel Utilization Distributions, KUDs) of radiotracked brown treesnakes (BTS) frequenting the forest edge (A blue 75% isopleths surrounded by grey 95% isopleths), the forest interior (B green 75% isopleths surrounded by grey 95% isopleths), and combined (C) on Guam. Edge snakes (those with > 30% [mean = 63 ± 22%] of observations within 50 m of forest edge) had significantly smaller 3D activity volumes compared to interior snakes (those with < 30% [mean = 13 ± 7%] of observations within 50 m of forest edge; df = 18, T = − 2.29, p = 0.04). Outer black line in each panel represents the Habitat Management Unit (HMU, 13.596 N, 144.865 E) boundary fence. Inset shows the relative position of the HMU (indicated by the star) on the north end of Guam.

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