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Urban Ornithologyis the first quantitative historical analysis of any New York City natural area's birdlife and spans the century and a half from 1872 to 2016. Only Manhattan's Central and Brooklyn's Prospect Parks have preliminary species lists, not revised since 1967, and the last book examining the birdlife of the entire New York City area is now more than fifty years old. This book updates the avifaunas of those two parks, the Bronx, and other New York City boroughs. It treats the 301 bird species known to have occurred within its study area-Van Cortlandt Park and the adjacent Northwest Bronx-plus 70 potential additions. Its 123 breeding species are tracked from 1872 and supplemented by quantitative breeding bird censuses from 1937 to 2015. Gains and losses of breeding species are discussed in light of an expanding New York City inexorably extinguishing unique habitats.

In 1918, a strain of influenza A virus caused a human pandemic resulting in the deaths of 50 million people. A century later, with the advent of sequencing technology and corresponding phylogenetic methods, we know much more about the origins, evolution and epidemiology of influenza epidemics. Here we review the history of avian influenza viruses through the lens of their genetic makeup: from their relationship to human pandemic viruses, starting with the 1918 H1N1 strain, through to the highly pathogenic epidemics in birds and zoonoses up to 2018. We describe the genesis of novel influenza A virus strains by reassortment and evolution in wild and domestic bird populations, as well as the role of wild bird migration in their long-range spread. The emergence of highly pathogenic avian influenza viruses, and the zoonotic incursions of avian H5 and H7 viruses into humans over the last couple of decades are also described. The threat of a new avian influenza virus causing a human pandemic is still present today, although control in domestic avian populations can minimize the risk to human health. This article is part of the theme issue ‘Modelling infectious disease outbreaks in humans, animals and plants: approaches and important themes’. This issue is linked with the subsequent theme issue ‘Modelling infectious disease outbreaks in humans, animals and plants: epidemic forecasting and control’.

America is a nation of ardent, knowledgeable birdwatchers. But how did it become so? And what role did the field guide play in our passion for spotting, watching, and describing birds? This book tells the history of field guides to birds in America from the Victorian era to the present, relating changes in the guides to shifts in science, the craft of field identification, and new technologies for the mass reproduction of images. Drawing on experience and a wealth of archival research, this book shows how the twin pursuits of recreation and conservation have inspired birders and how field guides have served as the preferred method of informal education about nature for well over a century. The book begins with the first generation of late nineteenth-century birdwatchers who built the hobby when opera glasses were often the best available optics and bird identification was sketchy at best. As America became increasingly urban, birding became more attractive, and with Roger Tory Peterson's first field guide in 1934, birding grew in both popularity and accuracy. By the 1960s recreational birders were attaining new levels of expertise, even as the environmental movement made birding's other pole, conservation, a matter of human health and planetary survival. The book concludes by showing how recreation and conservation have reached a new balance in the last forty years, as scientists have increasingly turned to amateurs, whose expertise had been honed by the new guides, to gather the data they need to support habitat preservation.

We analyzed 15 cases of highly pathogenic avian influenza (HPAI) clade 2.3.4.4b virus infections detected in wild birds in South Korea during September 2023-March 2024. We isolated and sequenced 8 H5N1 and 7 H5N6 viruses. We investigated spatiotemporal transmission dynamics by using a Bayesian discrete trait phylodynamic model that incorporated geographic and host species information. Our source-sink dynamics support introductions of H5N1 viruses from northern Japan to South Korea and subsequent spread through multiple regions in South Korea. The H5N6 viruses were most likely introduced into southwestern South Korea and spread northeastward. Wild waterfowl, especially wild ducks, played a key role in transmission of both H5N1 and H5N6 viruses. Our data showed multiple introductions and extensive spread of HPAI clade 2.3.4.4b viruses and bidirectional transmission between Japan and South Korea. Our results highlight the value of enhanced active surveillance for monitoring HPAI viruses, which can provide insight into preventing future outbreaks.

During the 2022-23 winter season, >1,500 endangered cranes, including hooded cranes (Grus monacha) and white-naped cranes (Grus vipio), were found debilitated or dead in the Izumi Plain, Japan. Most of the cranes, particularly those collected in November, were infected with highly pathogenic avian influenza (HPAI) H5N1 viruses; virus shedding was higher from the trachea than from the cloaca. The isolation rate from the cranes' roost water was not markedly higher than that of previous seasons, suggesting that the viruses might be more effectively transmitted among cranes via the respiratory route than through feces. Most wild bird-derived H5N1 isolates were phylogenetically distinct from viruses isolated on nearby chicken farms, indicating limited relationship between the wild bird and chicken isolates. Serologic analyses suggested that herd immunity had little effect on outbreak subsidence. This study deepens our understanding of the circumstances surrounding the unexpected HPAI outbreaks among these endangered cranes.

Since 2021, highly pathogenic avian influenza (HPAI) A(H5N1) clade 2.3.4.4b virus has affected wild bird populations globally. Griffon vultures (Gyps fulvus), a species hitherto considered unexposed, experienced an HPAI H5N1 outbreak in 2022 in southern Europe, leading to moderate mortality and reduced breeding success. The integration of virological, serologic, phylogenetic, and ecologic data revealed a short yet intense viral circulation and a probable common source of infection. The dissemination across Spain and France was likely caused by frequent interpopulation movements of birds. This integrated overview of the 2022 HPAI outbreak in vultures provides novel insights into the role of large-scale movements of wild birds in the spread of such disease. Understanding the epidemiologic dynamics of HPAI H5N1 in these scavenger species is crucial because the birds play vital roles in ecosystem functioning. Their susceptibility to this virus highlights potential broader ecologic effects of the ongoing outbreaks.

About the Authors: Nídia S. Trovão Affiliation: Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America ORCID logo http://orcid.org/0000-0002-2106-1166 Martha I. Nelson * E-mail: nelsonma@mail.nih.gov Affiliation: Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America ORCID logo http://orcid.org/0000-0003-4814-0179 Introduction Influenza A viruses (IAVs) are one of the most intensively studied pathogens, due to the severe global mortality and economic disruption associated with influenza pandemics [1]. In the latter decades of the 20th century, the replacement of small-scale swine farms with larger, more efficient production systems (Fig 1A) had profound effects on disease dynamics. (A) Trends in consolidation of swine production in the US, 1964 to 2012 (data available from the US Department of Agriculture and the National Agricultural Statistics Service Quick Stats Database). There are multiple challenges to understanding the human–animal interface for IAVs: (1) There is a need for coordination between animal health and public health research, (2) the genomics of host switches are too complex to accurately predict zoonotic potential from genetic sequence alone, and (3) spillover events can be rare and difficult to detect via traditional modes of virological surveillance, particularly in developing countries.

Global dispersion of high pathogenicity avian influenza (HPAI), especially that caused by H5 clade 2.3.4.4, has threatened poultry industries and, potentially, human health. An HPAI virus, A/northern pintail/Hokkaido/M13/2020 (H5N8) (NP/Hok/20) belonging to clade 2.3.4.4b, was isolated from a fecal sample collected at a lake in Hokkaido, Japan where migratory birds rested, October 2020. In the phylogenetic trees of all eight gene segments, NP/Hok/20 fell into in the cluster of European isolates in 2020, but was distinct from the isolates in eastern Asia and Europe during the winter season of 2017–2018. The antigenic cartography indicates that the antigenicity of NP/Hok/20 was almost the same as that of previous isolates of H5 clade 2.3.4.4b, whereas the antigenic distances from NP/Hok/20 to the representative strains in clade 2.3.4.4e and to a strain in 2.3.4 were apparently distant. These data imply that HPAI virus clade 2.3.4.4b should have been delivered by bird migration despite the intercontinental distance, although it was not defined whether NP/Hok/20 was transported from Europe via Siberia where migratory birds nest in the summer season. Given the probability of perpetuation of transmission in the northern territory, periodic updates of intensive surveys on avian influenza at the global level are essential to prepare for future outbreaks of the HPAI virus.

A dynamic account of ornithological history in America's heartland.    Today, more than fifty million Americans traipse through wetlands at dawn, endure clouds of mosquitoes, and brave freezing autumn winds just to catch a glimpse of a bird.The human desire to connect with winged creatures defies age and generation.

Influenza A viruses infect large numbers of warm-blooded animals, including wild birds, domestic birds, pigs, horses, and humans. Influenza viruses can switch hosts to form new lineages in novel hosts. The most significant of these events is the emergence of antigenically novel influenza A viruses in humans, leading to pandemics. Influenza pandemics have been reported for at least 500 years, with inter-pandemic intervals averaging approximately 40 years.