Testing and training data for machine learning models to detect, classify and count blackbirds damaging agriculture using drone-based imagery

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Duttenhefner, Jessica L.
Originator: ElSaid, AbdElRahman A.
Originator: Klug, Page E.
Publication_Date: 2026
Title:
Testing and training data for machine learning models to detect, classify and count blackbirds damaging agriculture using drone-based imagery
Geospatial_Data_Presentation_Form: tabular digital data
Series_Information:
Series_Name: Research Dataset Series
Publication_Information:
Publication_Place: Fort Collins, CO
Publisher: USDA, APHIS, WS National Wildlife Research Center
Online_Linkage: https://doi.org/10.2737/NWRC-RDS-2025-002
Description:
Abstract:
We used drones to capture images of mixed-species blackbird (Icteridae) flocks damaging sunflower (Helianthus annuus) in North Dakota. Images included several blackbirds (Icteridae) that breed in North Dakota and are considered agricultural pests, including red-winged blackbirds (RWBL) (Agelaius phoeniceus), common grackles (Quiscalus quiscula), yellow-headed blackbirds (Xanthocephalus xanthocephalus), brown-headed cowbirds (Molothrus ater), and European starlings (Sturnidae: Sturnus vulgaris). This study was implemented between September 2021 and October 2022 in multiple counties in North Dakota, USA, where blackbird damage to sunflowers is prevalent. We simultaneously hazed and captured video and photographs of flocks with the drone, thus images consist of airborne flocks with sky, green vegetation, or tan vegetation backgrounds. Images were used to train and test two models: 1) a ResNet-18 convolutional neural network (CNN) model to detect flocks of varying size and distance from the camera and 2) Faster Region-based Convolutional Neural Network (Faster-RCNN) models to detect individual blackbirds, classify individual blackbirds by species and for RWBL sex and age class, and count blackbirds. The Faster-RCNN model required individual birds in the images to be manually annotated by trained biologists for model training. This data publication contains the data and R code used to analyze these data, as well as the 400 images used in the models to detect blackbird flocks, the 131 images used in the models to detect and classify individual blackbirds, and the 131 image annotation files.
Purpose:
We designed this study to assess efficacy of drone-based aerial imagery combined with deep learning algorithms to accurately detect mixed-species blackbird flocks, as well as detect, classify, and count individual birds on varying backgrounds.
Supplemental_Information:
For more information about this study and these data, see Duttenhefner et al. (2025).
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 202109
Ending_Date: 202210
Currentness_Reference:
Ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Drone images were captured in multiple counties in North Dakota, USA, where blackbird damage to sunflowers is prevalent.
Bounding_Coordinates:
West_Bounding_Coordinate: -100.84000
East_Bounding_Coordinate: -99.79000
North_Bounding_Coordinate: 48.99000
South_Bounding_Coordinate: 46.08000
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme:
Theme_Keyword_Thesaurus: National Research & Development Taxonomy
Theme_Keyword: Ecology, Ecosystems, & Environment
Theme_Keyword: Wildlife (or Fauna)
Theme_Keyword: Birds
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: blackbird
Theme_Keyword: drones
Theme_Keyword: unmanned aircraft systems
Theme_Keyword: UAS
Theme_Keyword: monitoring
Theme_Keyword: automation
Theme_Keyword: background removal
Theme_Keyword: Faster-RCNN
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: North Dakota
Taxonomy:
Keywords/Taxon:
Taxonomic_Keyword_Thesaurus:
None
Taxonomic_Keywords: multiple species
Taxonomic_Keywords: vertebrates
Taxonomic_System:
Classification_System/Authority:
Classification_System_Citation:
Citation_Information:
Originator: ITIS
Publication_Date: 2025
Title:
Integrated Taxonomic Information System
Geospatial_Data_Presentation_Form: on-line database
Other_Citation_Details:
Retrieved [September, 17, 2025]; CC0
Online_Linkage: https://www.itis.gov/
Online_Linkage: https://doi.org/10.5066/F7KH0KBK
Taxonomic_Procedures:
Taxonomic_Classification:
Taxon_Rank_Name: Kingdom
Taxon_Rank_Value: Animalia
Applicable_Common_Name: Animal
Applicable_Common_Name: animaux
Applicable_Common_Name: animals
Taxonomic_Classification:
Taxon_Rank_Name: Subkingdom
Taxon_Rank_Value: Bilateria
Applicable_Common_Name: triploblasts
Taxonomic_Classification:
Taxon_Rank_Name: Infrakingdom
Taxon_Rank_Value: Deuterostomia
Taxonomic_Classification:
Taxon_Rank_Name: Phylum
Taxon_Rank_Value: Chordata
Applicable_Common_Name: cordés
Applicable_Common_Name: cordado
Applicable_Common_Name: chordates
Taxonomic_Classification:
Taxon_Rank_Name: Subphylum
Taxon_Rank_Value: Vertebrata
Applicable_Common_Name: vertebrado
Applicable_Common_Name: vertébrés
Applicable_Common_Name: vertebrates
Taxonomic_Classification:
Taxon_Rank_Name: Infraphylum
Taxon_Rank_Value: Gnathostomata
Taxonomic_Classification:
Taxon_Rank_Name: Superclass
Taxon_Rank_Value: Tetrapoda
Taxonomic_Classification:
Taxon_Rank_Name: Class
Taxon_Rank_Value: Aves
Applicable_Common_Name: Birds
Applicable_Common_Name: oiseaux
Taxonomic_Classification:
Taxon_Rank_Name: Order
Taxon_Rank_Value: Passeriformes
Applicable_Common_Name: Perching Birds
Applicable_Common_Name: passereaux
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Icteridae
Applicable_Common_Name: New World Orioles
Applicable_Common_Name: New World Blackbirds
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Xanthocephalus
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Xanthocephalus xanthocephalus
Applicable_Common_Name: Carouge à tête jaune
Applicable_Common_Name: graúna-de-cabeça-amarela
Applicable_Common_Name: sargento-de-cabeça-amarela
Applicable_Common_Name: Tordo cabeciamarillo
Applicable_Common_Name: Yellow-headed Blackbird
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Agelaius
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Agelaius phoeniceus
Applicable_Common_Name: Carouge à épaulettes
Applicable_Common_Name: graúna-de-asa-vermelha
Applicable_Common_Name: sargento-d'asa-vermelha
Applicable_Common_Name: Sargento alirrojo
Applicable_Common_Name: Tordo sargento
Applicable_Common_Name: Red-winged Blackbird
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Quiscalus
Applicable_Common_Name: grackles
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Quiscalus quiscula
Applicable_Common_Name: Quiscale bronzé
Applicable_Common_Name: rabo-de-quilha
Applicable_Common_Name: rabo-de-quilha-comum
Applicable_Common_Name: Zanate común
Applicable_Common_Name: Common Grackle
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Molothrus
Applicable_Common_Name: Cowbirds
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Molothrus ater
Applicable_Common_Name: Vacher à tête brune
Applicable_Common_Name: chupim-mulato
Applicable_Common_Name: vaqueiro-de-cabeça-castanha
Applicable_Common_Name: Tordo cabecipardo
Applicable_Common_Name: Tordo cabeza café
Applicable_Common_Name: Brown-headed Cowbird
Taxonomic_Classification:
Taxon_Rank_Name: Family
Taxon_Rank_Value: Sturnidae
Applicable_Common_Name: étourneaux
Applicable_Common_Name: Starlings
Taxonomic_Classification:
Taxon_Rank_Name: Genus
Taxon_Rank_Value: Sturnus
Applicable_Common_Name: Starlings
Taxonomic_Classification:
Taxon_Rank_Name: Species
Taxon_Rank_Value: Sturnus vulgaris
Applicable_Common_Name: Estornino pinto
Applicable_Common_Name: European Starling
Applicable_Common_Name: étourneau sansonnet
Applicable_Common_Name: Common Starling
Access_Constraints: None
Use_Constraints:
These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. If you use these data in a publication, presentation, or other research product please use the following citation:

Duttenhefner, Jessica L.; ElSaid, AbdElRahman A.; Klug, Page E. 2026. Testing and training data for machine learning models to detect, classify and count blackbirds damaging agriculture using drone-based imagery. Research Dataset Series. USDA, APHIS, WS National Wildlife Research Center. Ft. Collins, Colorado. https://doi.org/10.2737/NWRC-RDS-2025-002
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA, APHIS, Wildlife Service, National Wildlife Research Center
Contact_Person: Page Klug
Contact_Position: Supervisory Research Wildlife Biologist
Contact_Address:
Address_Type: mailing and physical
Address: 4101 LaPorte Ave.
City: Fort Collins
State_or_Province: CO
Postal_Code: 80521
Country: USA
Contact_Voice_Telephone: 701-630-3776
Contact_Electronic_Mail_Address: page.e.klug@usda.gov
Contact Instructions: This contact information was current as of original publication date. For current information see Contact Us page on: https://doi.org/10.2737/RDS.
Data_Set_Credit:
This project was funded by the National Sunflower Association (NSA; Project# 20-P03) and the United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center (USDA APHIS WS NWRC; No. 7438-0020-CA).


Author Information:

Jessica L. Duttenhefner
North Dakota State University, Department of Biological Sciences
https://orcid.org/0009-0006-2672-8421

AbdElRahman A. ElSaid
University of North Carolina Wilmington, Department of Computer Science
https://orcid.org/0000-0001-5218-6917

Page E. Klug
USDA Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center
https://orcid.org/0000-0002-0836-3901
Cross_Reference:
Citation_Information:
Originator: Duttenhefner, Jessica L.
Originator: ElSaid, AbdElRahman A.
Originator: Klug, Page E.
Publication_Date: 2025
Title:
Machine learning to detect, classify, and count blackbirds damaging agriculture using drone-based imagery: Supporting AI-driven automation for deployment of damage management tools
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Ecological Informatics
Issue_Identification: 92: 103495
Online_Linkage: https://doi.org/10.1016/j.ecoinf.2025.103495
Analytical_Tool:
Analytical_Tool_Description:
R is a language and environment for statistical computing and graphics.
Tool_Access_Information:
Online_Linkage: https://www.R-project.org/
Tool_Access_Instructions:
See website
Tool_Citation:
Citation_Information:
Originator: R Core Team
Publication_Date: 2024
Title:
R: A language and environment for statistical computing
Geospatial_Data_Presentation_Form: software
Publication_Information:
Publication_Place: Vienna, Austria
Publisher: R Foundation for Statistical Computing
Online_Linkage: https://www.R-project.org/
Analytical_Tool:
Analytical_Tool_Description:
LabelImg: open-access image annotation tool, to label individual birds with bounding boxes while minimizing background
Tool_Access_Information:
Online_Linkage: https://pypi.org/project/labelImg/1.8.1/
Tool_Access_Instructions:
See website
Tool_Citation:
Citation_Information:
Originator: Lin, TzuTa
Publication_Date: 2018
Title:
LabelImg
Edition: v1.8.1
Geospatial_Data_Presentation_Form: software
Online_Linkage: https://pypi.org/project/labelImg/1.8.1/
Back to Top
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
We were unable to get a true count of blackbirds, due to limitations in counting large flocks, distance from ground observers, and physical obscurities (e.g., topography and birds under crop canopy). All biologists annotating the images were adequately trained, and all annotations were verified by a single biologist (JLD). The forward-facing camera and the simultaneous motion of both the drone and birds led to misleading size comparisons, overlap between neighboring individuals, and blurred imagery, which limited the performance of both manual and algorithmic methods. Background removal based on HSV color space and frequency-ranked pixel masking was used to address visual similarity between birds and vegetative backgrounds.
Logical_Consistency_Report:
The data are logically consistent. The consistency was verified as part of the quality assurance during data analysis.
Completeness_Report:
All data are complete. The data are organized with each row representing an individual tile (i.e., tile_id). Given not all tiles contained all classifications (i.e., unid, ahy, hy, fem, cogr, yhbl, bhco, eust) the NAs in accuracy columns (unid_accuracy = 801 NAs; ahy_accuracy = 1,025 NAs; hy_accuracy = 2,144 NAs; fem_accuracy = 1,327 NAs; cogr_accuracy = 2,215 NAs; yhbl_accuracy = 2,653 NAs; bhco_accuracy = 2,650 NAs; eust_accuracy = 2,688 NAs) and correct columns (unid_correct = 1,071 NAs; ahy_correct = 1,171 NAs; hy_correct = 2,336 NAs; fem_correct = 1,596 NAs; cogr_correct = 2,349 NAs; yhbl_correct = 2,669 NAs; bhco_correct = 2,677 NAs; eust_correct = 2,700 NAs) are logical and correct.
Lineage:
Methodology:
Methodology_Type: Field
Methodology_Description:
We conducted 60 drone flights in sunflower fields and adjacent cattail marshes in North Dakota, where mixed-species blackbird flocks were actively foraging in sunflower from 01 September to 25 October (2021–2022) between 07:45 and 12:45. We used one drone to lift flocks off the crop and another to capture video of flocks in flight with variable backgrounds. The pilot-in-command (JLD) and another pilot flew a DJI Mavic Air 2 and a DJI Mavic 2 Pro (SZ DJI Technology Co. Ltd., Shenzhen, China) manually towards the flock at approximately 2 meters above ground level. Before reaching the flock, we stopped forward motion of the Mavic 2 Pro, hovered, and adjusted the camera to capture video and photos of birds with a sky background. We flew the drone at variable heights with the camera parallel to the ground (i.e., forward-facing). We flew the Mavic Air 2 through the center of the flock until we had collected adequate footage. Drone speeds varied depending on flock behavior and logistics to capture imagery.

Our coordinated drone flights produced imagery (i.e., video frames and photos) of an airborne flock with sky, green vegetation, or tan vegetation background. We used 400 images to train and test a ResNet-18 convolutional neural network (CNN) model to detect flocks of varying size and distance from the camera and 131 images to test and train a Faster Region-based Convolutional Neural Network (Faster-RCNN) models to detect individual blackbirds, classify individual blackbirds by species and for RWBL sex and age class, and count blackbirds. Images used in the Faster-RCNN model were annotated by six trained biologists using LabelImg (Tzutalin; v1.8.1), an open-access image annotation tool, to label individual birds with bounding boxes while minimizing background. To train and test the model, images were divided into smaller, fixed-size tiles, resulting in 10,874 annotated tiles, which were randomly shuffled and split into a training dataset (75%; 8,155 tiles) and a testing dataset (25%; 2,719 tiles). We evaluated the CNN flock detection model by performing 5-fold cross-validation experiments and calculating accuracy. We evaluated the performance of the Faster-RCNN models for 1) detecting individual blackbirds by calculating accuracy, precision, recall, and F1 score, and 2) classifying individual blackbirds by calculating the percent correctly classified. For counting, we evaluated the model's ability to make counts close to the observer count (i.e., percent difference between observer counts and model counts). We evaluated percent difference for the total number of birds, number of species, and number of male and female RWBL on each of the three backgrounds.


For complete details, see Duttenhefner et al. (2025).
Methodology_Citation:
Citation_Information:
Originator: Duttenhefner, Jessica L.
Originator: ElSaid, AbdElRahman A.
Originator: Klug, Page E.
Publication_Date: Unpublished material
Title:
Machine learning to detect, classify, and count blackbirds damaging agriculture using drone-based imagery: Supporting AI-driven automation for deployment of damage management tools
Geospatial_Data_Presentation_Form: journal article
Series_Information:
Series_Name: Ecological Informatics
Issue_Identification: 92: 103495
Online_Linkage: https://doi.org/10.1016/j.ecoinf.2025.103495
Process_Step:
Process_Description:
No process steps have been described for this data set.
Process_Date: Unknown
Back to Top
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Below you will find a list and description of the files included in this data publication.

VARIABLE DESCRIPTION FILE (1)

1. \Data\_variable_descriptions.csv: Comma-separated values (CSV) file containing a list and description of variables found in the data file. (A description of these variables is also provided in the metadata below.)

Columns include:

Filename = name of data file

Variable = name of variable

Units = units (if applicable)

Precision = precision (if applicable)

Description = description of variable



DATA FILES (1)

1. \Data\EcolInfom_PerformanceDataset.csv: CSV file containing data for evaluating the performance (i.e., accuracy and percent correct) of the Faster-RCNN model used to detect and classify individual blackbirds by species and for red-winged blackbirds (RWBL) sex and age class. This file can be used with the provided R code (\Supplements\Duttenhefner_etal_2025_EcolInform.R) to analyze the results as reported in Duttenhefner et al. (2025).

Variables include:

tile_id = Unique identification for each tile produced for training

background = Prevalent background type occupying the individual tile (sky, green, tan)

total_count = Total number of birds on the tile

unid_accuracy = Model accuracy (%) for detecting individual unidentified birds.

ahy_accuracy = Model accuracy (%) for detecting individual ahy (after hatch year) red-winged blackbirds

hy_accuracy = Model accuracy (%) for detecting individual hy (hatch year) red-winged blackbirds

fem_accuracy = Model accuracy (%) for detecting individual fem (female) red-winged blackbirds

cogr_accuracy = Model accuracy (%) for detecting individual cogr (common grackle)

yhbl_accuracy = Model accuracy (%) for detecting individual yhbl (yellow-headed blackbird)

bhco_accuracy = Model accuracy (%) for detecting individual bhco (brown-headed cowbird)

eust_accuracy = Model accuracy (%) for detecting individual eust (European starling)

unid_correct = Correctly classified (%) individual unidentified birds

ahy_correct = Correctly classified (%) individual ahy (after hatch year) red-winged blackbirds

hy_correct = Correctly classified (%) individual hy (hatch year) red-winged blackbirds

fem_correct = Correctly classified (%) individual fem (female) red-winged blackbirds

cogr_correct = Correctly classified (%) individual cogr (common grackles)

yhbl_correct = Correctly classified (%) individual yhbl (yellow-headed blackbirds)

bhco_correct = Correctly classified (%) individual bhco (brown-headed cowbirds)

eust_correct = Correctly classified (%) individual eust (European starlings)



SUPPLEMENTAL FILES (663)

1. \Supplements\Duttenhefner_etal_2025_EcolInform.R: Text file containing R code. This code can be used with the provided CSV files to replicate results step by step as they appear in Duttenhefner et al. (2025).

2-132. \Supplements\BirdAnnotationXML\Trial [###] - [DESCRIPTION].xml: XML files (131) containing annotations used to train the Faster Region-based Convolutional Neural Network (Faster-RCNN) models to detect individual blackbirds, classify individual blackbirds by species and for RWBL sex and age class, and count blackbirds. These files were created while manually annotating photos with LabelImg (Tzutalin; v1.8.1).

133-263. \Supplements\BirdFrames\Trial [###] - [DESCRIPTION].jpg: Joint Photographic Experts Group (JPG) files (131) containing images used in the Faster Region-based Convolutional Neural Network (Faster-RCNN) models to detect individual blackbirds, classify individual blackbirds by species and for RWBL sex and age class, and count blackbirds.

264-663. \Supplements\FlockFrames\Trial [###] - [DESCRIPTION].jpg: JPG files (400) containing images used in the ResNet-18 convolutional neural network (CNN) model to detect flocks of varying size and distance from the camera.
Entity_and_Attribute_Detail_Citation:
Duttenhefner, Jessica L.; ElSaid, AbdElRahman A.; Klug, Page E. 2025. Machine learning to detect, classify, and count blackbirds damaging agriculture using drone-based imagery: Supporting AI-driven automation for deployment of damage management tools. Ecological Informatics. 92: 103495. https://doi.org/10.1016/j.ecoinf.2025.103495
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA Forest Service, Research and Development
Contact_Position: Research Data Archivist
Contact_Address:
Address_Type: mailing and physical
Address: 240 West Prospect Road
City: Fort Collins
State_or_Province: CO
Postal_Code: 80526
Country: USA
Contact_Voice_Telephone: see Contact Instructions
Contact Instructions: This contact information was current as of November 2025. For current information see Contact Us page on: https://doi.org/10.2737/RDS.
Resource_Description: NWRC-RDS-2025-002
Distribution_Liability:
Metadata documents have been reviewed for accuracy and completeness. Unless otherwise stated, all data and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. However, neither the author, the Archive, nor any part of the federal government can assure the reliability or suitability of these data for a particular purpose. The act of distribution shall not constitute any such warranty, and no responsibility is assumed for a user's application of these data or related materials.

The metadata, data, or related materials may be updated without notification. If a user believes errors are present in the metadata, data or related materials, please use the information in (1) Identification Information: Point of Contact, (2) Metadata Reference: Metadata Contact, or (3) Distribution Information: Distributor to notify the author or the Archive of the issues.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Version_Number: see Format Specification
Format_Specification:
Comma-separated values file
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.2737/NWRC-RDS-2025-002
Digital_Form:
Digital_Transfer_Information:
Format_Name: JPG
Format_Version_Number: see Format Specification
Format_Specification:
Joint Photographic Experts Group file
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.2737/NWRC-RDS-2025-002
Digital_Form:
Digital_Transfer_Information:
Format_Name: R
Format_Version_Number: see Format Specification
Format_Specification:
Text file (*.R) containing R code
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.2737/NWRC-RDS-2025-002
Digital_Form:
Digital_Transfer_Information:
Format_Name: XML
Format_Version_Number: see Format Specification
Format_Specification:
Extensible Markup Language file
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://doi.org/10.2737/NWRC-RDS-2025-002
Fees: None
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20251115
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USDA, APHIS, Wildlife Service, National Wildlife Research Center
Contact_Person: Page Klug
Contact_Position: Supervisory Research Wildlife Biologist
Contact_Address:
Address_Type: mailing and physical
Address: 4101 LaPorte Ave.
City: Fort Collins
State_or_Province: CO
Postal_Code: 80521
Country: USA
Contact_Voice_Telephone: 701-630-3776
Contact_Electronic_Mail_Address: page.e.klug@usda.gov
Contact Instructions: This contact information was current as of original publication date. For current information see Contact Us page on: https://doi.org/10.2737/RDS.
Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
Back to Top