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Breeding density and habitat preferences of the European Turtle Dove Streptopelia turtur Linnaeus, 1758 (Columbiformes: Columbidae) in Bulgaria: preliminary results

(Plovdiv University Press "Paisii Hilendarski", 2026-01-15) Gruychev, Gradimir; Stoyanov, Stoyan; Angelov, Evlogi; Mihaylov, Hristo

We conducted country-wide surveys from 15 May to 31 July 2022 to quantify singing males’ population size and habitat-specific density of Turtle Dove (Streptopelia turtur). We applied point counts at survey stations situated in 11 plot locations systematically distributed across the country. The average Turtle Dove’s density was estimated as 10.1 singing birds per 1 km2 (λ = 10.084, SE = 0.674, 95% CI: 8.846 – 11.496). The mean detection probability (p) was 0.115 (95% CI: 0.105 – 0.126), and the scale parameter of half-normal detection function was 120 m (σ = 119.74 m, SE = 3.53, 95% CI: 113.03 – 126.86). The effective radius was 169.33 m (95% CI: 159.84 – 179.37). The Turtle Dove densities were influenced by altitude with lower densities in higher elevations. The number of singing males increased from May to July. The abundance was influenced by habitat type and land cover, and it was positively correlated with tree height and shrub height measured around sampling points. The highest densities were recorded around stubbles, sunflower crops, and in a mixture of agricultural land cover, although their importance was insignificant. The density of singing males was higher in open areas, in oak and mixed deciduous forests, and in Paliurus communities as well.

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THE USE OF THE PUPPET THEATRE AS A TOOL FOR TEACHING AND STIMULATING STUDENTS’ IMAGINATION

(Plovdiv University Press, 2026) Kapon, Zoya

This article examines a working educational theatrical practice that has been established in the dynamically developing contemporary theatrical art, namely the work with theatre puppets for the development of actors' imagination. Puppet theatrical techniques, with their specificity, possess a high educational potential for building vivid imagination, spontaneity and creativity in the process of educating contemporary multifunctional actors.

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TOWARDS A FULLY CROSS-PLATFORM, UNICODE-COMPLIANT, SOFTWARE ENTRY SYSTEM FOR DIGITISATION OF OLD BULGARIAN TEXTS

(Plovdiv University Press, 2026) Mathewson, John

This article makes a case for moving from a plethora of ways of digitising Old Bulgarian texts that are incompatible with each other towards a software package that is cross-platform and results in texts that utilise the Unicode standard and are completely cross-compatible. It also describes the programming of just such a software package.

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ADJECTIVAL -ING PARTICIPLES: ROOTS AND MANIFESTATIONS OF ADJECTIVENESS

(Plovdiv University Press, 2026) Georgieva, Nikoleta

This paper investigates the adjectival nature of the English -ing participle, tracing its roots and examining its manifestations. The adjectival characteristics are conceptualized in two distinct ways: (1) adjectiveness – an inherent property of some participles, rooted in their semantic content, and (2) adjectivization – an acquired property resulting from syntactic deployment. The analysis reviews existing criteria for the classification of -ing participles in order to identify the most reliable ones and to organise them into distinct sets corresponding to each of the two phenomena. In addition, the study investigates both the principal meanings conveyed by adjectival -ing participles and the verb classes that hold the greatest potential for their derivation, presenting a meaning-based classification of adjectival -ing forms.

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STRUCTURING INFORMATION: INSIGHTS FROM A CORPUS-BASED STUDY OF PASSIVE VOICE

(Plovdiv University Press, 2026) Spasov, Krasimir

The present paper explores how speakers use the passive voice in spoken English as a practical tool for organizing information and guiding listeners through a message. Rather than being just a stylistic alternative to the active voice, the passive often helps speakers highlight what is already familiar, keep a topic in focus, leave out agents that do not matter, and place heavier or more complex details towards the end of a clause. Using examples from the Corpus of Contemporary American English (COCA), this paper shows that these choices reflect broader tendencies in the English language toward presenting information from given to new and maintaining a smooth flow of ideas. The findings suggest that the passive voice plays a meaningful role in real-time communication by helping speakers manage attention and process demands.