Tichodroma (Dec 2019)
K hniezdnemu výskytu kôrovníka krátkoprstého (Certhia brachydactyla) v lesoch západnej časti Cerovej vrchoviny(južné Slovensko) / On breeding occurence of Short-toed Treecreeper (Certhia brachydactyla) in forests of the western part of the Cerová vrchovina Mts. (S Slovakia)
Abstract
Mapping of breeding territories of Short-toed Treecreeper (Certhia brachydactyla) took place in the forests of the western part of Cerová vrchovina in 2017. Of the total area (61 km²), forests account for 36.6 km². The species has only been registered in oak forests and mixed deciduous forests with oaks aged 60 years and older. Those stands covered 32% (11.54 km²) of the total forest area in the study area. In total, 47 Short-toed Treecreeper territories were found. Breeding density was 1.28 p./100 ha of the total forest area. The local density varied between 0.5–4.2 p./10 ha, on average 1.4 p./10 ha. The local breeding density of species breeding territories was positively associated with stand age (R2 = 0.19, P = 0.003). Sympatric occurrence with Eurasian Treecreeper (C. familiaris) was also mapped at breeding sites occupied by Short-toed Treecreeper. The breeding territories of the Short-toed Treecreeper overlapped with the breeding areas of the Eurasian Treecreeper at 30 sites (in which 31 Eurasian Treecreeper territories have been registered), i.e. in 66.7% of the sites occupied by Short-toed Treecreeper. Eurasian Treecreeper is more numerous in the woods of the study area than Short-toed Treecreeper.
