Invasive alien species frequently encounter limited natural predation pressure in their non-native ranges, which can contribute significantly to their unchecked proliferation and adverse ecological impacts. Here, we document a novel instance of a livestock guardian dog preying upon an adult coypu (Myocastor coypus) in Lake Kerkini, Greece—a significant observation given the coypu’s status as a prominent invasive species with few natural predators in Europe. The coypu’s presence in the region, coupled with the absence of effective predation among others, has allowed it to establish a robust population and exert considerable pressure on local ecosystems. This novel observation not only highlights an unusual predator–prey interaction involving a domestic mammal traditionally used for livestock management but also provides insights into understanding how domestic animals might inadvertently influence the dynamics of invasive species, potentially serving as a complementary tool in conservation management. By demonstrating that domestic dogs could play a role in controlling invasive species populations, our findings introduce a previously unconsidered aspect of invasive species management with conservation implications.

Interspecific interactions among sympatric carnivores are critical for understanding patterns of coexistence, competition, and community structure. Among mesocarnivores, dominance hierarchies are typically shaped by differences in body size, social organization, and competitive ability. The golden jackal (Canis aureus) is generally assumed to dominate the red fox (Vulpes vulpes) across shared landscapes, particularly at high-value resources such as carcasses. However, here, we present rare behavioral evidence that challenges this prevailing assumption. Using motion-triggered camera traps deployed at a carcass in Lake Kerkini National Park, Greece, we recorded a sequence of interactions in which a golden jackal displayed clear submissive behavior toward a red fox, including lowered body posture, tail tucking, and conflict avoidance. Subsequent footage revealed two additional agonistic encounters, during which the same red fox successfully displaced two separate jackals, one of which emitted a distress vocalization while retreating. These findings represent the first documented case of interspecific submission by golden jackals toward a red fox and suggest that context-specific factors—such as immediate carcass possession, individual experience, or body condition—may modulate expected dominance outcomes. Our observations underscore the importance of fine-scale behavioral studies in revealing plasticity in interspecific relationships and contribute to a more nuanced understanding of carnivore competition under semi-natural conditions.

Invertebrate predation on amphibians is widespread, although unreported in Europe. Here, we present documented predation of the Karpathos water frog (Pelophylax cerigensis) by the crab Potamon karpathos. Pelophylax cerigensis is an endangered, endemic species exclusively found on the Rhodes and Karpathos Islands in the South Aegean Sea, Greece. The Karpathos population is at risk due to limited suitable habitats and a scarcity of freshwater bodies on the island. From April to October, when there is no rain on the island, frogs and crabs cohabitate, sharing the same shallow ditches. Incidents of frog predation by crabs are common, indicated by numerous individuals with amputated limbs and scars, representing an additional threat to the endangered frog. Further research on the interactions between the two species is urgently required, as it has direct conservation implications.

Dorsolateral flattening is a defensive behavior observed in several snake taxa, typically involving lateral expansion of the body to increase apparent size and deter predators. Although this behavior has been documented in other snake families, its occurrence in boid snakes remains poorly understood. Here, we present the first confirmed field observations of full-body dorsolateral flattening in Eryx jaculus , a boid species native to southeastern Europe. The behavior was recorded under natural conditions during close approach, attempted capture, or brief handling and involved coordinated lateral expansion along the entire body trunk. In several cases, flattening was accompanied by mock strikes, mainly expressed during attempted capture. These observations indicate a multi-modal defensive strategy that combines visual and behavioral deterrents. This expands the known behavioral repertoire of Boidae and supports the hypothesis that full-body flattening may represent a convergent trait evolved independently across phylogenetically distant lineages. We discuss the anatomical basis, ecological context, and potential adaptive significance of these behaviors, contributing new insights into snake defensive strategies within European species assemblages. More broadly, this study provides new insight into the defensive ecology of a poorly documented European boid and highlights the importance of opportunistic field observations for detecting rare or context-dependent antipredator behaviors.

Shrikes (Lanius spp.) are predatory passerines with a diverse diet that often includes lizards, yet their feeding ecology in Greece remains poorly documented. Here, we report the first case of the great grey shrike Lanius excubitor Linnaeus, 1758 preying on the Balkan wall lizard Podarcis tauricus (Georgi, 1801) in Greece. The observation was made in January 2023 in Central Macedonia under unusually mild winter conditions (~20 °C). The shrike captured and impaled an adult female lizard on a thorn. This record extends the known prey spectrum of the species and underscores the influence of climatic anomalies on predator–prey interactions.

A new species of cave cricket, Dolichopoda balrogi sp. nov ., is described from the Greek island of Kastellorizo (Dodecanese, Levantine Sea). The species is documented from artificial subterranean habitats, as no accessible natural caves are known on the island. Detailed morphological analysis of both sexes reveals a unique combination of characters, including the structure of the male epiphallus, the shape of the tenth tergite, the presence of styli on the male subgenital plate, and the morphology of the female ovipositor, which clearly differentiate it from all known congeners. Comparative morphology indicates strong affinities with Anatolian species of Dolichopoda , particularly D. sbordonii and D. lycia , and no close relationship with the Aegean species complex occurring on islands of East Aegean and the adjacent Anatolian coast. These affinities are further supported by molecular phylogenetic analyses inferred from DNA barcoding. Both Bayesian inference and maximum likelihood analyses consistently recover the Kastellorizo lineage as a distinct and well-supported clade nested within the southwestern Anatolian lineage of the genus. The discovery of D. balrogi sp. nov . represents the first documented occurrence of an Anatolian lineage of Dolichopoda within European territory, underscoring the unique biogeographical character of Kastellorizo as a Greek territory with pronounced Anatolian biogeographical affinities. This finding emphasizes the importance of integrated morphological and molecular approaches in resolving species boundaries and evolutionary relationships and contributes to the growing evidence of underestimated biodiversity in the eastern Mediterranean region.