Abstract
Levels of nesting site selection were identified: landscape level is related to birds’ choice of landscape with yellow, pink, white, and green aspects. Ecosystem level corresponds to the detection of a water body by birds. The birds detect a station with the necessary vegetation association, where grasses and meadow halophytic associations are the basis of vegetation. The local (point) level is caused by the presence of a necessary host plant, which is a protector of birds’ nests. The main signals for the selection of nesting conditions for yellow wagtails as a reflection of semiotics are (in order): landscape – habitats of predominantly yellow, less frequently pink, white and green aspects; ecosystem – proximity of a water body (river, lake, etc.); statistical – halophytic associations. The following aspects of the nesting habitats are considered: ecosystem – proximity to a water body (river, lake, etc.); statistical – halophytic vegetation and grasses on sandy loam, loamy, solonchak soils suitable for nesting holes; local (point) – presence of host plant to protect the nest. Birds select nesting habitats based on the availability of all available signals, which increases the possibility and success of colony formation. The manifestation of semiotics: yellow wagtails in the nesting habitat tend to lose their visibility and dissolve into the background of the biotope, which is a special adaptation against predator attack.
Reference106 articles.
1. Alström P. & Mild K., 2003 – Pipits & Wagtails of Europe, Asia and North America (Indentification and systematics). Helm, London.
2. Alström P. & Ödeen A., 2002 – Incongruence between mitochondrial DNA, nuclear DNAand non-molecular data in the avian genus Motacilla: implications for estimates of species phylogenies. In: Species Limits and Systematics in Some Passerine Birds. Alström P. (eds.). Uppsala University.
3. Alström P., Jønsson K. A., Fjeldså J., Ödeen A., Ericson P. G. P. & Irestedt M., 2015 – Dramatic niche shifts and morphological change in two insular bird species. Royal Society Open Science, 2: 1-9 (140364-140364).
4. Andersson S., Örnborg J. & Andersson M., 1998 – Ultraviolet sexual dimorphism and assortative mating in blue tits. Proceedings of the Royal Society of London B: Biological Sciences, 265 (1395): 445-450.
5. Artemieva E. А., 2020 – Modern evolutionism and the views of A. A. Lyubishchev on the problem of species. Novitates Theriologicae, 12: 371-379. [In Russian]. (For control http://terioshkola.org.ua/library/nt12-species/nt1261-artemieva.htm)