@article{zulian_norris_cockle_porter_do_de groot_2023, title={Seasonal variation in drivers of bird-window collisions on the west coast of British Columbia, Canada}, volume={18}, ISSN={["1712-6568"]}, DOI={10.5751/ACE-02482-180215}, abstractNote={,}, number={2}, journal={AVIAN CONSERVATION AND ECOLOGY}, author={Zulian, Viviane and Norris, Andrea R. and Cockle, Kristina L. and Porter, Alison N. and Do, Lauryn G. and De Groot, Krista L.}, year={2023}, month={Nov} }
 @article{luza_rodrigues_mamalis_zulian_2023, title={Spatial distribution of the greater rhea, Rhea americana (Linnaeus, 1758), in Rio Grande do Sul, southern Brazil: citizen-science data, probabilistic mapping, and comparison with expert knowledge}, volume={8}, ISSN={["2662-673X"]}, url={https://doi.org/10.1007/s43388-023-00143-3}, DOI={10.1007/s43388-023-00143-3}, journal={ORNITHOLOGY RESEARCH}, author={Luza, Andre L. and Rodrigues, Arthur V. and Mamalis, Louisa and Zulian, Viviane}, year={2023}, month={Aug} }
 @article{temporal variation in roost use by the endangered vinaceous-breasted parrot (amazona vinacea) in southern brazil._2022, url={https://journals.sfu.ca/ornneo/index.php/ornneo/article/view/647/617}, journal={Ornitologia Neotropical}, year={2022}, month={Jul} }
 @article{zulian_miller_ferraz_2021, title={Endemic and Threatened <i>Amazona</i> Parrots of the Atlantic Forest: An Overview of Their Geographic Range and Population Size}, url={https://www.mdpi.com/1424-2818/13/9/416}, DOI={10.3390/d13090416}, abstractNote={Amazona is the largest genus of the Psittacidae, one of the most threatened bird families. Here, we study four species of Amazona (Amazona brasiliensis, A. pretrei, A. vinacea, and A. rhodocorytha) that are dependent on a highly vulnerable biome: the Brazilian Atlantic Forest. To examine their distribution and abundance, we compile abundance estimates and counts, and develop site-occupancy models of their geographic range. These models integrate data from formal research and citizen science platforms to estimate probabilistic maps of the species’ occurrence throughout their range. Estimated range areas varied from 15,000 km2 for A. brasiliensis to more than 400,000 km2 for A. vinacea. While A. vinacea is the only species with a statistical estimate of abundance (~8000 individuals), A. pretrei has the longest time series of roost counts, and A. rhodocorytha has the least information about population size. The highest number of individuals counted in one year was for A. pretrei (~20,000), followed by A. brasiliensis (~9000). Continued modeling of research and citizen science data, matched with collaborative designed surveys that count parrots at their non-breeding roosts, are essential for an appropriate assessment of the species’ status, as well as for examining the outcome of conservation actions.}, journal={Diversity}, author={Zulian, Viviane and Miller, David A. W. and Ferraz, Gonçalo}, year={2021}, month={Aug} }
 @article{zulian_miller_ferraz_2021, title={Improving estimation of species distribution from citizen-science records using data-integration models}, url={https://doi.org/10.1101/2021.04.09.439158}, DOI={10.1101/2021.04.09.439158}, abstractNote={Mapping species distributions is a crucial but challenging requirement of wildlife management. The frequent need to sample vast expanses of potential habitat increases the cost of planned surveys and rewards accumulation of opportunistic observations. In this paper, we integrate planned survey data from roost counts with opportunistic samples from eBird, WikiAves and Xeno-canto citizen-science platforms to map the geographic range of the endangered Vinaceous-breasted Parrot. We demonstrate the estimation and mapping of species occurrence based on data integration while accounting for specifics of each data set, including observation technique and uncertainty about the observations. Our analysis illustrates 1) the incorporation of sampling effort, spatial autocorrelation, and site covariates in a joint-likelihood, hierarchical, data-integration model; 2) the evaluation of the contribution of each data set, as well as the contribution of effort covariates, spatial autocorrelation, and site covariates to the predictive ability of fitted models using a cross-validation approach; and 3) how spatial representation of the latent occupancy state (i.e. realized occupancy) helps identify areas with high uncertainty that should be prioritized in future field work. Our results reveal a Vinaceous-breasted Parrot geographic range of 434,670 km2, which is three times larger than the ‘Extant’ area previously reported in the IUCN Red List. The exclusion of one data set at a time from the analyses always resulted in worse predictions by the models of truncated data than by the full model, which included all data sets. Likewise, exclusion of spatial autocorrelation, site covariates, or sampling effort resulted in worse predictions. The integration of different data sets into one joint-likelihood model produced a more reliable representation of the species range than any individual data set taken on its own improving the use of citizen science data in combination with planned survey results.}, author={Zulian, Viviane and Miller, David A. W. and Ferraz, Gonçalo}, year={2021}, month={Apr} }
 @article{zulian_miller_ferraz_2021, title={Integrating citizen‐science and planned‐survey data improves species distribution estimates}, volume={27}, url={http://dx.doi.org/10.1111/ddi.13416}, DOI={10.1111/ddi.13416}, abstractNote={Mapping species distributions is a crucial but challenging requirement of wildlife management. The frequent need to sample vast expanses of potential habitat increases the cost of planned surveys and rewards accumulation of opportunistic observations. In this paper, we integrate planned‐survey data from roost counts with opportunistic samples from eBird, WikiAves and Xeno‐canto citizen‐science platforms to map the geographic range of the endangered Vinaceous‐breasted Parrot. We demonstrate the estimation and mapping of species occurrence based on data integration while accounting for specifics of each dataset, including observation technique and uncertainty about the observations.}, number={12}, journal={Diversity and Distributions}, publisher={Wiley}, author={Zulian, Viviane and Miller, David A. W. and Ferraz, Gonçalo}, editor={Jung, MartinEditor}, year={2021}, month={Dec}, pages={2498–2509} }
 @article{addressing multiple sources of uncertainty in the estimation of global parrot abundance from roost counts: a case study with the vinaceous-breasted parrot (amazona vinacea)_2020, volume={248}, url={http://dx.doi.org/10.1016/j.biocon.2020.108672}, DOI={10.1016/j.biocon.2020.108672}, abstractNote={Population size is a key predictor of extinction risk and is critical to listing species in IUCN threat categories. Assessing population size can be particularly difficult for gregarious species, such as parrots—one of the most threatened bird families—whose ecology and behavior generate multiple sources of uncertainty that need to be addressed in monitoring efforts. To improve estimates of abundance for the endangered Vinaceous-breasted Parrot (Amazona vinacea), we combined extensive roost counts over the global range of the species (Argentina, Paraguay, Brazil) with an intensive regional survey designed to address five sources of uncertainty about parrot abundance in western Santa Catarina state (WSC), Brazil, in 2016 and 2017. We estimated abundance at both regional and whole-range scales using N-mixture models of replicated count data, which account for imperfect detection. The regional-scale estimate was 1826 ± 236 and 1896 ± 105 individuals for 2016 and 2017, respectively; global abundance was estimated at 7789 ± 655 and 8483 ± 693 individuals for the same two years. We found no statistical evidence of population change at either scale of the analysis. Although our assessments of abundance and geographic range are larger than those currently reported by the IUCN, we suggest the Vinaceous-breasted Parrot should remain in the ‘Endangered’ IUCN threat category pending further investigation of population trends. We recommend that roost-monitoring programs for parrots consider and address sources of uncertainty through adequate field protocols and statistical analyses, to better inform assessments of population size, trends, and threat status.}, journal={Biological Conservation}, publisher={Elsevier BV}, year={2020}, month={Aug}, pages={108672} }
 @article{zulian_müller_cockle_lesterhuis_júnior_prestes_martinez_ferraz_2018, title={Addressing multiple sources of uncertainty in the estimation of parrot abundance from roost counts: a case study with the Vinaceous-breasted Parrot (Amazona vinacea)}, url={https://doi.org/10.1101/455774}, DOI={10.1101/455774}, abstractNote={Population size is a key predictor of extinction risk and is critical to listing species in IUCN threat categories. The population size of parrots—one of the most threatened bird families—is often assessed using roost counts, which suffer from multiple sources of uncertainty that need to be addressed in monitoring efforts. To improve estimates of abundance for endangered Vinaceous-breasted Parrot (Amazona vinacea), we compared extensive roost counts over the whole range of the species (Argentina, Paraguay, Brazil) with an intensive regional survey designed to address five sources of uncertainty about parrot abundance in western Santa Catarina state (WSC), Brazil, in 2016 and 2017. We estimated regional-scale abundance using a sampling design that minimizes double counting and an N-mixture model of replicated count data, which accounts for imperfect detection, implemented in a Bayesian framework. The whole-range counts amounted to 3,888 and 4,084 individuals in 2016 and 2017, respectively; regional estimates were 945 ± 50 and 1,393 ± 40 individuals, for the same two years. We found no evidence of population growth because the increase in numbers matched an increase in observation effort on both spatial scales. When extrapolating the WSC abundance estimate to three hypothetical geographical range areas of the species, under the simplifying assumption of homogenous density, we obtained values above the whole-range counts, but within the same order of magnitude, putting the global population size of Vinaceous-breasted Parrot in the thousands of individuals. Although our estimates of abundance and geographic range are larger than those currently reported by the IUCN, we suggest that Vinaceous-breasted Parrot remain in the ‘Endangered’ IUCN threat category pending further investigation of population trends. We recommend that roost-monitoring programs for parrots consider and address sources of uncertainty through field protocols and statistical analysis, to better inform assessments of population size, trends, and threat status.}, author={Zulian, Viviane and Müller, Eliara Solange and Cockle, Kristina L. and Lesterhuis, Arne and Júnior, Roberto Tomasi and Prestes, Nêmora Pauletti and Martinez, Jaime and Ferraz, Gonçalo}, year={2018}, month={Oct} }
 @article{dénes_tella_zulian_prestes_martı́nez jaime_hiraldo_2018, title={Combined impacts of multiple non-native mammals on two life stages of a critically endangered Neotropical tree}, volume={20}, url={http://dx.doi.org/10.1007/s10530-018-1758-4}, DOI={10.1007/s10530-018-1758-4}, number={11}, journal={Biological Invasions}, publisher={Springer Science and Business Media LLC}, author={Dénes, Francisco V. and Tella, José L. and Zulian, Viviane and Prestes, Nêmora P. and Martı́nez Jaime and Hiraldo, Fernando}, year={2018}, month={Nov}, pages={3055–3068} }
 @article{tella_dénes_zulian_prestes_martı́nez jaime_blanco_hiraldo_2016, title={Endangered plant-parrot mutualisms: seed tolerance to predation makes parrots pervasive dispersers of the Parana pine}, volume={6}, url={http://dx.doi.org/10.1038/srep31709}, DOI={10.1038/srep31709}, abstractNote={Parrots are largely considered plant antagonists as they usually destroy the seeds they feed on. However, there is evidence that parrots may also act as seed dispersers. We evaluated the dual role of parrots as predators and dispersers of the Critically Endangered Parana pine (Araucaria angustifolia). Eight of nine parrot species predated seeds from 48% of 526 Parana pines surveyed. Observations of the commonest parrot indicated that 22.5% of the picked seeds were dispersed by carrying them in their beaks. Another five parrot species dispersed seeds, at an estimated average distance of c. 250 m. Dispersal distances did not differ from those observed in jays, considered the main avian dispersers. Contrary to jays, parrots often dropped partially eaten seeds. Most of these seeds were handled by parrots, and the proportion of partially eaten seeds that germinated was higher than that of undamaged seeds. This may be explained by a predator satiation effect, suggesting that the large seeds of the Parana pine evolved to attract consumers for dispersal. This represents a thus far overlooked key plant-parrot mutualism, in which both components are threatened with extinction. The interaction is becoming locally extinct long before the global extinction of the species involved.}, number={1}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Tella, José L. and Dénes, Francisco V. and Zulian, Viviane and Prestes, Nêmora P. and Martı́nez Jaime and Blanco, Guillermo and Hiraldo, Fernando}, year={2016}, month={Aug} }