Fig. 1
(Source: created with MapChart.net, accessed 27 December 2023 and 29 February 2024, https://www.mapchart.net/index.html)
A The geographical location of Bulgaria: Bulgaria is part of the Balkan Peninsula, located in South-Eastern Europe, with geographic coordinates 42.733883° N and 25.48583° E.; B A detailed map showing the 28 administrative provinces; the arrows indicate the eleven rural areas where field observations were carried out: 1—Oreshak (43.30141° N, 27.91352° E), 2—Kalimantsi (43.278° N, 27.72235° E), 3—Belogradets (43.35156° N, 27.33323° E), 4—Vinitsa (43.24573° N, 27.98047° E), 5—Godech (43.0667° N, 23.0667° E), 6—Tsatsarovtsi (42.86492° N, 22.86398° E), 7—Batanovtsi (42.60065° N, 22.95526° E), 8—Apriltsi (42.84079° N, 24.9134° E), 9—Silistra (44.1183° N, 27.26° E), 10—Elhovo (2.1724° N, 26.5676° E), and 11—Padarevo (42.72903° N, 26.66968° E)