A new westward migration route in an Asian passerine bird

Current Biology, Journal Year: 2021, Volume and Issue: 31(24), P. 5590 - 5596.e4

Published: Oct. 22, 2021

Language: Английский

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Avian migration clocks in a changing world

Journal of Comparative Physiology A, Journal Year: 2024, Volume and Issue: 210(4), P. 691 - 716

Published: Feb. 2, 2024

Abstract Avian long-distance migration requires refined programming to orchestrate the birds’ movements on annual temporal and continental spatial scales. Programming is particularly important as typically anticipate future environmental conditions. Hence, has long been of particular interest in chronobiology. Captivity studies using a proxy, shift nocturnality during seasons (i.e., migratory restlessness), have revealed circannual circadian regulation, well an innate sense direction. Thanks rapid development tracking technology, detailed information from free-flying birds, including annual-cycle data actograms, now allows relating this mechanistic background behaviour wild. Likewise, genomic approaches begin unravel many physiological pathways that contribute migration. Despite these advances, it still unclear how programmes are integrated with specific conditions experienced journey. Such knowledge imminently environments undergo anthropogenic modification. Migratory birds group not dealing changes, yet some species show remarkable adjustments at behavioural genetic levels. Integrated research interdisciplinary collaborations needed understand range responses change, more broadly, functioning timing under natural

Language: Английский

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Projected Shifts in Bird Distribution in India under Climate Change

Diversity, Journal Year: 2023, Volume and Issue: 15(3), P. 404 - 404

Published: March 10, 2023

Global climate change is causing unprecedented impacts on biodiversity. In India, there little information available regarding how affects biodiversity at the taxon/group level, and large-scale ecological analyses have been lacking. this study, we demonstrated applicability of eBird GBIF (Global Biodiversity Information Facility), produced national-scale forecasts to examine possible terrestrial avifauna in India. Using data collected by citizen scientists, developed fine-tuned Species Distribution Models (SDMs) predicted 1091 bird species that would be distributed India 2070 two climatic surfaces (RCP 4.5 8.5), using Maximum Entropy-based distribution algorithms. Of modelled, our findings indicate 66–73% will shift higher elevations or northward, 58–59% 8.5) lose a portion their ranges. Furthermore, ranges 41–40% increase. Under both RCP scenarios diversity significantly increase regions above 2500 m elevation. Both predict extensive changes richness western Himalayas, Sikkim, northeast Ghats 2070. This study has resulted novel, high-resolution maps across predominantly northward shifts ranges, similar predictions made for other regions, such as Europe USA.

Language: Английский

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Do human–wildlife interactions predict offspring hiding strategies in peri-urban fallow deer?

Royal Society Open Science, Journal Year: 2024, Volume and Issue: 11(3)

Published: March 1, 2024

Human activities can induce significant behavioural changes in wildlife. Often explored through extractive interactions (e.g. hunting) that favour certain traits, the implications of non-extractive ones, such as wildlife feeding, remain understudied. Research shows people tend to bolder individuals within populations despite their dynamics and consequences being unclear. Using fallow deer a peri-urban environment, we studied whether mothers show reduced fear humans consistently approach them for food adopt weaker anti-predator strategies by selecting less concealed fawning bedsites closer human hotspots. This would provide advantage additional feeding opportunities comparison with shyer while keeping fawns close. Our dataset encompassed 281 capture events 172 from 110 across 4 years. Surprisingly, regularly accepted selected more farther hotspots, giving offspring better protection also benefitting during lactation. results adaptations subset females and, first time, link tendency protect offspring. Given previous findings these begging deliver heavier at birth, our research further investigates human–wildlife implications.

Language: Английский

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Range shifts of overwintering birds depend on habitat type, snow conditions and habitat specialization

Oecologia, Journal Year: 2022, Volume and Issue: 199(3), P. 725 - 736

Published: June 29, 2022

Climatic warming is forcing species to shift their ranges poleward, which has been demonstrated for many taxa globally. Yet, the influence of habitat types on within- and among-species variations distribution shifts rarely studied, especially during non-breeding season. Here, we investigated habitat-specific distances northern range margins directions center based long-term data overwintering birds in Finland. Specifically, explored influences type, species' snow depth tolerance, climatic niche specialization past 40 years 81 bird species. Birds arable land shifted more clearly toward north compared same rural forest habitats, while margin did not significantly differ among types. Range were linked with tolerance rather than niche. Snow was negatively associated eastward direction across all found patterns northward distances. Species stronger specializations strongly as generalist species, whereas only marginally correlated shifts, so that cold-dwelling longer eastward. Our study reveals conditions boreal highlights importance availability preference climate driven shifts.

Language: Английский

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An integrated model for prediction of hydrologic anomalies for habitat suitability of overwintering geese in a large floodplain wetland, China

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 331, P. 117239 - 117239

Published: Jan. 11, 2023

Language: Английский

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Fast food in the city? Nomadic flying-foxes commute less and hang around for longer in urban areas

Behavioral Ecology, Journal Year: 2021, Volume and Issue: 32(6), P. 1151 - 1162

Published: June 11, 2021

Abstract Urbanization creates novel ecological spaces where some species thrive. Geographical urbanization promotes human–wildlife conflict; however, we know relatively little about the drivers of biological urbanization, which poses impediments for sound wildlife management and conservation action. Flying-foxes are extremely mobile move nomadically in response to flowering resources, but now increasingly found urban areas, reasons that poorly understood. To investigate mechanisms behind flying-fox examined movement 99 satellite tracked grey-headed flying-foxes (Pteropus poliocephalus) over 1 year versus non-urban environments. We individuals preferentially visited major-urban roosts, exhibited higher fidelity foraged shorter distances when roosting areas. In contrast other colonial species, there were no density-dependent effects colony size on foraging distance, suggesting at a landscape scale, distribute themselves across roosts an ideal-free manner, minimizing competition resources. Yet, males consistently than females, local scale reflect competitive inequalities between individuals. Overall, our study supports hypothesis is driven by increased spatiotemporal availability food resources areas; unlike it likely consequence visitation nomadic rather subset population becoming “urban residents” per se. discuss implications behavior report highly species.

Language: Английский

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How migratory birds might have tracked past climate change

Proceedings of the National Academy of Sciences, Journal Year: 2022, Volume and Issue: 119(3)

Published: Jan. 10, 2022

Organisms’ responses to past climatic extremes provide a useful perspective for understanding the impacts of ongoing and increasingly rapid climate change. Volant organisms can disperse long distances, allowing them find colonize new habitats during periods However, ability move distances does not necessarily imply increased responsiveness or resiliency For example, long-distance migratory songbirds rely on innate genetic programs that may lack evolutionary flexibility, making it more challenging track environmental change (1). The birds historical extremes, such as those Last Glacial Period, important context current challenges facing natural world. In PNAS, Thorup et al. (2) show bird species could have maintained behavior through last 120,000 y, lifestyle might been key adapting shifts without suffering population declines. During Maximum (21,000 y before present), ice covered large extents present-day breeding ranges breed in Northern Hemisphere boreal summer, including red-backed shrike ( Lanius collurio ). Red-backed shrikes are open with scattered woody vegetation hunt insects other small animals, often impaling their prey twigs, thorns, wire. Today, across western Eurasia leave winter; tracked individuals from grounds Scandinavia nonbreeding southern Africa. At Maximum, areas that, today, host suitable habitat would inhospitable shrikes, almost entirely absent its European range. Forced south … [↵][1]1Email: vandoren{at}cornell.edu. [1]: #xref-corresp-1-1

Language: Английский

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Nighthawk: Acoustic monitoring of nocturnal bird migration in the Americas

Methods in Ecology and Evolution, Journal Year: 2023, Volume and Issue: 15(2), P. 329 - 344

Published: Dec. 26, 2023

Abstract Animal migration is one of nature's most spectacular phenomena, but migratory animals and their journeys are imperilled across the globe. Migratory birds among well‐studied on Earth, yet relatively little known about in‐flight behaviour during nocturnal migration. Because many migrating bird species vocalize flight, passive acoustic monitoring shows great promise for facilitating widespread Here, we present Nighthawk, a deep learning model designed to detect identify vocalizations nocturnally birds. We trained Nighthawk using diverse dataset recordings from Americas. Our results demonstrate that performs well as flight call detector classifier dozens avian taxa, both at level broader taxonomic groups (e.g. orders families). It achieves an average precision score above 0.80 50 mean 0.96 4 orders. The accurately quantified nightly intensity (80% variation explained) phenology (78% performed data North America. Incorporating modest amounts additional annotated audio (50–120 h) into training yielded high performance target datasets South America (average order Passeriformes >0.99). By actively birds, provides detailed window onto not presently attainable by other means radar or citizen science). Scientists, managers practitioners could use with number applications, including: passage wind farms; studying airspace usage flights; changing migrations susceptible climate change; revealing previously unknown routes behaviours. Overall, this work will empower stakeholders efficiently monitor Western Hemisphere collect in aid science conservation.

Language: Английский

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Non-breeding movements of the Black-tailed Gull (Larus crassirostris)

Avian Research, Journal Year: 2023, Volume and Issue: 14, P. 100103 - 100103

Published: Jan. 1, 2023

With the continued development of tracking technology and increasing interest in animal movement, our understanding migration behavior has become more comprehensive. However, there are still many species that have not been well studied, particularly sea birds. Here, we present first year-round Global Positioning System (GPS) data Black-tailed Gull (Larus crassirostris) at population level. We used solar-powered GPS-Global for Mobile communication (GSM) loggers to successfully track 30 individuals breeding Xingrentuo Islet, Liaoning Province, China, 1–3 years. Except one individual who roamed far north Yellow Sea during non-breeding period, all others did a directed southward migration. Migration routes wintering sites differed among migrating gulls between years birds tracked two or Additionally, wintering, were likely travel over large body water shift sites, some trajectories quite complex, which was probably closely related what observed field about their boat-chasing behavior. Compared movements, post-breeding movements ranged smaller area. Specifically, almost them had long period near islet (≥120 days, <220 ​km from islet), 80% than year least faithful site. only approximately half pre-breeding shorter (3–20 days) closer (≤80 ​km). distance varied (range 209–2405 ​km) moved period. Furthermore, found movement occurred when temperature dropped; specifically, directly migrated away Our results suggest but short high diversity patterns (in especial sites).

Language: Английский

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