Amid accelerating global biodiversity loss, reintroducing and translocating endangered species have become pivotal conservation strategies. This study used radio telemetry to investigate the dispersal and movement patterns of the reintroduced Great Capricorn Beetle Cerambyx cerdo (Coleoptera: Cerambycidae) L. within Tromt & ouml; Nature Reserve, Sweden. We tracked 50 beetles (29 females, 21 males) from 17 June 2022 to 17 July 2022, quantified their movements within the landscape and recorded the distances moved across oak-rich areas at the northern edge of the species' range. Female beetles were significantly larger and heavier than males, with longer antennae. The beetles were relocated an average of 9.5 times. Total movement distances ranged from 2.8 to 822.2 m, with no significant association of movement distance or movement speed with sex, body size or mating status. We conclude that C. cerdo can reach oaks several hundred meters away and that dispersal distances were not associated with sex, body size or mating status. We recommend future studies employing more advanced telemetry techniques to refine estimates of long-distance dispersal and habitat use.

Recent extinctions of protected butterflies in regions with strong conservation frameworks raise concerns about biodiversity loss in northwestern Europe. Using historical records, citizen science data and systematic surveys, we documented the local extinctions of three butterfly species (Parnassius mnemosyne ssp. argiope, Melitaea britomartis, and Plebejus argyrognomon), which are high-priority conservation targets in Sweden and beyond. Parnassius mnemosyne is further protected under the EU Habitats Directive, Swedish national regulations, and the Bern Convention. While some European butterflies are expanding northward with climate change, these three diet and habitat specialists show range contractions across their distributions. Following the severe drought in 2018, M. britomartis was last observed in Sweden that same year, P. argyrognomon persisted until 2019, and P. mnemosyne ssp. argiope until 2023. Despite Sweden's environmental protection measures, species action plans, and monitoring programs, these extinctions highlight the vulnerability of isolated populations on northern margins to land-use intensification and extreme weather events. Conservation success now hinges on coordinated efforts by universities, environmental authorities, and conservation organizations to not only manage remaining grassland specialists but also restore and reconnect habitat at the landscape scale. Tre dagfj & auml;rilsarter som bevarandearbetet fokuserat p & aring; har nyligen f & ouml;rsvunnit fr & aring;n s & ouml;dra Sverige. Efter den sv & aring;ra torkan 2018 f & ouml;rsvann veronikan & auml;tfj & auml;ril och kron & auml;rtsbl & aring;vinge, medan mnemosynefj & auml;rilen och dess unika underart i s & ouml;dra Sverige, som dessutom & auml;r skyddad enligt EU:s art- och habitatdirektiv, artskyddsf & ouml;rordningen och Bernkonventionen, h & ouml;ll ut till 2023. Dessa utd & ouml;enden, som skett trots Sveriges omfattande & aring;tg & auml;rdsprogram och & ouml;vervakningsinsatser, visar hur s & aring;rbara isolerade populationer & auml;r f & ouml;r markanv & auml;ndningsf & ouml;r & auml;ndringar, bek & auml;mpningsmedel, f & ouml;roreningar och extrema v & auml;derh & auml;ndelser. Framg & aring;ngsrikt bevarande kr & auml;ver nu b & aring;de skydd och restaurering av stora n & auml;tverk med artrika gr & auml;smarker, samt forskning genom samordnade insatser mellan myndigheter och naturv & aring;rdsorganisationer.