Examples of four main intra-seasonal trends in abundance of detected pairs within the study area. Decreasing (Turdus philomelos) and increasing (Poecile montanus) trends were fitted by linear regression. Non-linear estimations were applied for species with peak abundances in the middle (Saxicola rubetra) and lowest abundances in the middle (Pyrrhula pyrrhula). Only individuals with territorial displays were included, spring flocks of adult birds and summer flocks of juveniles were excluded. For graphs of all species with at least ten recorded pairs within the study period see Fig. S1-S7.

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Context 1

... detected four main relationships between species abundance and the day of the year (Fig. 5). In many species (n = 24), I recorded a significant negative relationship between abundance and the day of the year ( Fig. S1-S4). This relationship was most pronounced (beta < -0.60) in Turdidae (song thrush Fig. S5). In other species I did not find a significant linear relationship ( Fig. S6-S7). In most of these species, no ...

Context 2

... detected four main relationships between species abundance and the day of the year (Fig. 5). In many species (n = 24), I recorded a significant negative relationship between abundance and the day of the year ( Fig. S1-S4). This relationship was most pronounced (beta < -0.60) in Turdidae (song thrush Fig. S5). In other species I did not find a significant linear relationship ( Fig. S6-S7). In most of these species, no relationship was detected (n = 21), but in some species (n = 8), I detected a non-linear trend during the breeding season. In six species (common wood pigeon Columba palumbus, red-backed shrike, whinchat, grey wagtail ...