Increased mortality rates caused by highly pathogenic avian influenza virus in a migratory raptor

Highly pathogenic avian influenza virus (HPAIV) has caused extensive mortalities in wild birds, with a disproportionate impact on raptors since 2021. The population-level impact of HPAIV can be informed by telemetry studies that track large samples of initially healthy, wild birds. We leveraged movement data from 71 rough-legged hawks (Buteo lagopus) across all major North American migratory bird flyways concurrent with the 2022–2023 HPAIV outbreak and identified a total of 29 mortalities, of which 11 were confirmed, and an additional ~9 were estimated to have been caused by HPAIV. We estimated a 28% HPAIV cause-specific mortality rate among rough-legged hawks during a single year concurrent with the HPAIV outbreak in North America. Additionally, the overall annual mortality rate during the HPAIV outbreak (47%) was significantly higher than baseline annual mortality rates (3–17%), suggesting that HPAIV-caused deaths were additive above baseline mortality levels. HPAIV mortalities were c..., , # Increased mortality rates caused by highly pathogenic avian influenza virus in a migratory raptor

Dataset DOI: [10.5061/dryad.n2z34tn92](10.5061/dryad.n2z34tn92)

## Description of the data and file structure

We leveraged movement data from GPS-tracked rough-legged hawks *Buteo lagopus* that coincided with the HPAIV panzootic in North America to determine its effect on annual mortality. All missing and unavailable data represented as NA 

### Files and variables

#### File: AnnualMortality.csv

**Description:** spreadsheet used to analyze the HPAIV effect on annual mortality.

##### Variables

* index: index number
* tagid: transmitter ID (unique to an individual hawk)
* year: 12-month study period. 2020 = 1-Mar-2020 to 28-Feb-2021, etc...
* date_begin: date within the 12-month study period that tracking began
* date_end: date within the 12-month study period that tracking ended
* duration: tracking duration (number of days)
* fate: individual fate during the 12-month study period...,

高致病性禽流感病毒（Highly Pathogenic Avian Influenza Virus, HPAIV）自2021年以来在野生鸟类中引发大规模死亡，其中猛禽受到的影响尤为严重。量化HPAIV对野生鸟类种群的整体影响，可通过追踪大量初始健康个体的遥测研究实现。本研究依托2022—2023年HPAIV北美暴发期间、覆盖北美所有主要候鸟迁飞路线的71只毛脚鵟（*Buteo lagopus*）的运动数据，共确认29只个体死亡：其中11只为确诊感染致死，另有约9只死亡个体经估算与HPAIV感染相关。研究估算，在北美HPAIV暴发的单一年度内，毛脚鵟的HPAIV特异性死亡率达28%。此外，暴发期间毛脚鵟的年度总死亡率（47%）显著高于基线年度死亡率（3%—17%），表明HPAIV导致的死亡是叠加于基线死亡率之上的额外致死因素。HPAIV相关死亡个体的相关信息……

# 迁徙性猛禽因高致病性禽流感病毒导致死亡率升高

数据集DOI: 10.5061/dryad.n2z34tn92

## 数据与文件结构说明
本研究利用与北美HPAIV大流行同期的GPS追踪毛脚鵟运动数据，以明确该病毒对其年度死亡率的影响。所有缺失或不可获取的数据均以NA标注。

### 文件与变量
#### 文件：AnnualMortality.csv
**描述**：用于分析HPAIV对年度死亡率影响的电子表格。
##### 变量
* index：索引编号
* tagid：发射器编号（单只毛脚鵟的唯一标识）
* year：12个月研究周期，例如2020年代表2020年3月1日至2021年2月28日
* date_begin：12个月研究周期内追踪启动日期
* date_end：12个月研究周期内追踪结束日期
* duration：追踪持续时长（单位：天）
* fate：12个月研究周期内个体的结局状态……