Understanding how disease moves through wildlife communities is essential to managing outbreaks of zoonotic diseases across the globe. Bovine tuberculosis is a disease caused by the bacterium Mycobacterium bovis that can threaten domestic and wildlife species. The mechanism by which Mycobacterium bovis is spread between species is still poorly understood. Previous reviews are limited in the breadth of species considered and are primarily concerned with transmission from wildlife to domestic species. We conducted a review and analysis of Mycobacterium bovis prevalence rates in European wildlife species to identify species of concern for the transmission of bovine tuberculosis in a wildlife community. We subsequently conducted a narrative review of these species assessing the risk of Mycobacterium bovis transmission in a wildlife community based on available literature. We calculated weighted mean disease prevalence rates to be highest in fallow deer (Dama dama, 20%), Eurasian badgers (Meles meles, 11%), wild boar (Sus scrofa, 9%) and red foxes (Vulpes vulpes, 4%). We considered these species to be of particular concern for the transmission of Mycobacterium bovis and selected them as the focus of our narrative review and risk assessment. Our risk assessment considered disease pathology, spatiotemporal activity patterns and animal behaviour as factors affecting the likelihood of Mycobacterium bovis transmission between wildlife species. We found that prior research has principally focused on a few individual species, but that Mycobacterium bovis transmission through a wildlife community is likely more complex. We determined that disease transmission between multiple species may compound the severity of an outbreak of bovine tuberculosis. Broad, multi‐species sampling campaigns and standardised Mycobacterium bovis testing protocols should be implemented in future studies. We also determined that an in‐depth analysis of spatiotemporal overlap between species was needed to better assess the risk of transmission between wildlife species.

Introduction: Over recent decades, the abundance and geographic ranges of wild ungulate species have expanded in many parts of Europe, including the UK. Populations are managed to mitigate their ecological impacts using interventions, such as shooting, fencing and administering contraception. Predicting how target species will respond to interventions is critical for developing sustainable, effective and efficient management strategies. However, the quantity and quality of evidence of the effects of interventions on ungulate species is unclear. To address this, we systematically mapped research on the effects of population management on wild ungulate species resident in the UK. Methods: We searched four bibliographic databases, Google Scholar and nine organisational websites using search terms tested with a library of 30 relevant articles. Worldwide published peer-reviewed articles were considered, supplemented by ‘grey’ literature from UK-based sources. Three reviewers identified and screened articles for eligibility at title, abstract and full-text levels, based on predefined criteria. Data and metadata were extracted and summarised in a narrative synthesis supported by structured graphical matrices. Results: A total of 123 articles were included in the systematic map. Lethal interventions were better represented (85%, n = 105) than non-lethal interventions (25%, n = 25). Outcomes related to demography and behaviour were reported in 95% of articles (n = 117), whereas effects on health, physiology and morphology were studied in only 11% of articles (n = 14). Well-studied species included wild pigs (n = 58), red deer (n = 28) and roe deer (n = 23). Conclusions: Evidence for the effects of population management on wild ungulate species is growing but currently limited and unevenly distributed across intervention types, outcomes and species. Priorities for primary research include: species responses to non-lethal interventions, the side-effects of shooting and studies on sika deer and Chinese muntjac. Shooting is the only intervention for which sufficient evidence exists for systematic review or meta-analysis.

Context: Deer (Cervidae) populations are increasing in many global regions, leading to concerns about their impacts on temperate forests. Advancing evidence‐based management requires a detailed understanding of the dietary habits of deer and how these are shaped by resource availability. Methodology: We studied the diet of fallow deer (Dama dama) in North Wales (United Kingdom), using faecal DNA metabarcoding. Samples were collected monthly from three woodlands during 2019–2021. Tree surveys and seasonal ground flora surveys were conducted in these woodlands and seven additional woodlands. Preference analyses were used to assess the consumption of plant taxa relative to their availability. Results: The fallow deer consumed high proportions of bramble (Rubus fruticosus agg.) across the seasons, especially in the winter months. Diet diversity was significantly lower in winter compared to the other seasons, suggesting that the deer were bulk foraging on a widely available, predictable resource to conserve energy during winter. Grasses did not form a major component of the diet in any season. The preference analysis showed that spatially clustered woody taxa (e.g. Betula sp., Corylus sp. and Fraxinus sp.) occurred less often than expected in the diet, while widespread woody species occurred in the diet more often than expected (e.g. Rosa sp., Prunus sp. and Quercus sp.). Practical implication: The expansion of deer populations in the United Kingdom has occurred alongside the recovery and maturation of degraded or planted forests since the middle of the 20th century. Despite reduced light availability in these closed‐canopy forests and increased herbivory pressure, bramble has remained a dominant understory plant compared to other less herbivory‐tolerant plant species. Perhaps as a consequence, bramble has become the winter survival resource for this fallow deer population, remaining a prominent dietary component throughout the year. With increasing disturbance from extreme weather and tree diseases leading to a more open canopy structure, bramble cover is set to increase in European forests, which could support further expansion of deer populations. As we work to expand tree cover and enhance forest resilience and biodiversity, we should seek to understand the dynamic interactions of increasing deer populations with rapidly changing treescapes.

There is great potential for the use of terrestrial laser scanning (TLS) to quantify aspects of habitat structure in the study of animal ecology and behaviour. Viewsheds—the area visible from a given position—influence an animal's perception of risk and ability to respond to potential danger. The management and conservation of large herbivores and their habitats can benefit greatly from understanding how vegetation structure shapes viewsheds and influences animal activity patterns and foraging behaviour. This study aimed to identify how woodland understory structure influenced horizontal viewsheds at deer eye height. Mobile TLS was used in August 2020 to quantify horizontal visibility—in the form of Viewshed Coefficients (VC)—and understory leaf area index (LAI) of 71 circular sample plots (15‐m radius) across 10 woodland sites in North Wales (UK) where fallow deer (Dama dama) are present. The plots were also surveyed in summer for woody plant size structure, stem density and bramble (Rubus fruticosus agg.). Eight plots were re‐scanned twice in winter to compare seasonal VC values and assess scan consistency. Sample plots with higher densities of small stems had significantly reduced VC 1 m from the ground. Other stem size classes, mean percentage bramble cover and understory LAI did not significantly affect VC. There was no difference in VC between summer and winter scans, or between repeated winter scans. The density of small stems influenced viewsheds at deer eye height and may alter behavioural responses to perceived risk. This study demonstrates how TLS technology can be applied to address questions in large herbivore ecology and conservation.

Context: Rapid expansion of deer (Cervidae) populations is a concern for forest ecosystems. Despite extensive reviews on how deer affect forests, variation in effects across deer species has received less attention. A lack of focus on species‐specific effects may lead to oversights and failure to achieve desired management outcomes. Methodology: We used a systematic approach to compile data on the extent to which the effects of seven deer species on woody vegetation have been studied. We focused on the six deer species present in Britain and Ireland, and elk (Cervus canadensis). Results: A total of 455 studies were included from across the globe. Red deer (Cervus elaphus) (n = 163) and elk (n = 158) were the most studied species, while Reeve's muntjac (Muntiacus reevesi) (n = 18) and Chinese water deer (Hydropotes inermis) (n = 5) were the least researched. Fifty‐four per cent of studies (n = 245) used fenced exclosures to assess deer impacts. Research mainly focused on defoliation via browsing and grazing (n = 424), while debarking (n = 44), defecation (n = 8) and trampling (n = 5) were less frequently studied. Vegetation density (n = 235), height (n = 189) and diversity (n = 135) were the most common metrics used, while fewer studies focused on vegetation mortality (n = 74), structural variability (n = 28) and condition (n = 15). Practical implication: While previous studies have often focused on the probability or severity of deer damage to woody vegetation, we identified key knowledge gaps on the ecological influence of such damage, with a species‐specific focus. Researchers should treat deer species as distinct entities and appreciate the differences in their body size, sociality, physiology and behaviour when studying their ecological effects. Where multiple deer species co‐occur, identifying relative local species abundance and differences among species foraging behaviours will help to determine how their interactions—whether additive, synergistic or antagonistic—affect ecosystem processes and vegetation dynamics.

Wild deer populations are increasing across the northern hemisphere, posing challenges to the environment and people. Deer impacts can be managed using lethal and non‐lethal practices, but research suggests lethal control receives mixed support. Differences in perspectives towards management practices may hinder collaborative, landscape‐scale strategies required to achieve resilient ecosystems and tree cover targets. Thus, understanding human‐deer relationships is crucial for sustainable deer management. To investigate perceptions towards deer and their management in England and Wales, we designed a questionnaire measuring the level of support for different actions to manage deer impacts and beliefs regarding the aesthetic and existence, environmental, economic and cultural‐symbolic value of deer. Targeting actors within and outside the land management, the questionnaire was distributed to subscribers of five national organisations, three focussing on wildlife management and two on woodland management. We collected data from 3936 people and, using cluster analysis, characterised groups of respondents based on their beliefs towards deer. We assessed variations between groups by socio‐demographic characteristics and support for lethal and non‐lethal management practices. Lethal control was the most supported and most used deer management practice, followed by tree guards and deer fencing. Our cluster analysis grouped respondents into 4 clusters. The cluster composed predominantly of deer stalkers (47%) held the most positive perceptions of deer and registered the highest support for lethal control and the highest opposition to deer fencing. Conversely, the cluster with the highest proportion of farmers (27%) and lowest proportion of stalkers (16%) expressed more neutral and negative opinions towards deer. There was no evidence of column clusters, indicating that beliefs did not cluster according to value dimensions (e.g. economic, environmental), suggesting that deer were valued similarly across all value dimensions. Differing opinions on deer and land management goals make it difficult for neighbours to collaborate on managing deer. Lethal control received strong support, which could ease concerns about recommending its use by nature organisations and decision‐makers who depend on public backing. Read the free Plain Language Summary for this article on the Journal blog.