Neighbor Proximity and Overlap
The number of singers at the site increased as the dry season
progressed, with peak numbers in June/July (n = 35). The number of
nearest neighbors at the time of tracking varied between one and six (x̄
= 2.4 ± 1.6). Neighbors were located adjacent to tens of meters away
across treeless farming fields. On three occasions an individual perched
within 10 m of our tracked singer in the territory, resulting in
antiphonal singing until the intruder left (Fig. 5). Area overlap of
neighbors tracked the same year (and three individuals with known site
fidelity across years) was low: There were no core SR overlaps and one
core NR overlap (x̄.5NRoverlap= 0.1 ± 0.05%, n = 2, Bats
12 and 14, Fig. 4). Overlap was small for 0.95 SR, ranging from 0% to
8.6% (x̄.95SRoverlap = 1.5 ± 2.5%, n = 17, Fig. 4,
Supp. Table 1). Neighbor pairs showed some overlap in the 0.95 isopleths
of NR, ranging from 0% to 25.6% (x̄.95All = 5.1 ±
7.8%, n = 24 possible overlaps, Fig. 4, Supp. Table 1), with the
largest overlap between the female and a neighboring male (Fig. 4, Supp.
Table 1), whose NR she frequented. Only one male’s NR overlapped with
the NR beyond a nearest neighbor (Bats 1- 2, Supp. Table 1).
DISCUSSION