DOI: 10.5061/dryad.v9s4mw70b
title: Data from: Bird predation on Roseau cane scale as revealed by a web image search and querying a citizen monitoring database

description: An invasion of Roseau cane scale, Nipponaclerda biwakoensis, native to
 East Asia, is associated with recent widespread dieback of common reed
 stands in the Mississippi River Delta, Louisiana. A previous study
 suggested that, in its native range, the combined mortality from Common
 Reed Bunting Emberiza schoeniclus and parasitoid wasps may control the
 abundance of Roseau cane scale. However, there is limited knowledge about
 which other bird species may prey on Roseau cane scale or the feeding
 patterns of these birds. Here, we used web search and citizen science
 monitoring data to tabulate bird predation events on Roseau cane scales
 across sites in Japan and determine which bird species may be the most
 important predators and when the observed feeding typically occurs. We
 scanned web entries using both Google image searches and the social
 networking services, including Twitter, Instagram, and Facebook.
 Additionally, we accessed long-term field observation records obtained by
 volunteer monitoring conducted by the members of the Kanagawa Branch of
 the Wild Bird Society of Japan. By using these citizen science approaches,
 we detected 16 bird species, mainly Common Reed Bunting but also other
 migratory and resident species, preying on the Roseau cane scale in reed
 beds throughout central Japan and most detection occurred during the
 winter. This study demonstrates that biological information obtained from
 publicly available data from citizen observers can be useful for exploring
 ecological patterns of various species including potential predators
 against invasive species.
description: This Noriyuki_2023_README.txt file was generated on 2025-08-15 by Suzuki
 Noriyuki GENERAL INFORMATION 1. Title of Dataset: Suzuki Noriyuki, Izumi
 Matsumoto, Tetsuro Yoshikawa, Shuji Kaneko, Hannah J. Broadley (2023) Bird
 predation on Roseau cane scale as revealed by a web image search and
 querying a citizen monitoring database 2. Corresponding Author Information
 Name: Dr Suzuki Noriyuki Institution: Kochi University, Japan Email:
 [fvgnoriyuki@gmail.com](mailto:fvgnoriyuki@gmail.com) 3. Date of data
 collection: 2023-01-12 4. Geographic location of data collection: Japan 5.
 Recommended citation for this dataset: Noriyuki, S., Matsumoto, I.,
 Yoshikawa, T., Kaneko, S., & Broadley, H. J. (2023) Bird predation on
 Roseau cane scale as revealed by a web image search and querying a citizen
 monitoring database. Ecosphere, Dryad, Dataset FILE LIST 1.
 bird_seasonality.csv: Number of bird observation in each month 2.
 bird_site.csv: Geographical coordinates for bird observation 3.
 bird_SNS.csv: Bird species detected in each social networking service
 DATA-SPECIFIC INFORMATION FOR: [bird_seasonality.csv] 1. Number of
 variables: 3 2. Number of rows: 24 3. Variable List: Source: Data from a
 citizen monitoring database (Volunteer) or web image search (Web) Month:
 From Jan to Dec total: Total number of bird observation in each month
 DATA-SPECIFIC INFORMATION FOR: [bird_site.csv] 1. Number of variables: 4
 2. Number of rows: 74 3. Variable List: lat: Latitude lon: Longitude
 Method: Web searching method scientific_name: Scientific name for bird
 species DATA-SPECIFIC INFORMATION FOR: [bird_SNS.csv] 1. Number of
 variables: 6 2. Number of rows: 16 3. Variable List: scientific_name:
 Scientific name for bird species Facebook: Number of observation from
 Facebook Google: Number of observation from Google image search Instagram:
 Number of observation from Instagram Twitter: Number of observation from
 Twitter Total: Total number of observation in each species