Biodiversity4all Research-Grade Observations

Latest version published by BioDiversity4All on May 21, 2020 BioDiversity4All

Observations from BioDiversity4All, an online social network of people sharing biodiversity information to help each other learn about nature. BioDiversity4All is maintained by Associação Biodiversidade Para Todos, and the Portuguese node of iNaturalist, a joint initiative of the California Academy of Sciences and the National Geographic Society. Observations included in this archive met the following requirements: * Published under one of the following licenses or waivers: 1), 2), 3) * Achieved one of following BioDiversity4All quality grades: Research * Created on or before 2020-02-25T18:00:33-07:00 You can view observations meeting these requirements at,CC-BY,CC-BY-NC&place_id=7122&quality_grade=research&subview=table&verifiable=any

Data Records

The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 55,100 records.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.


Download the latest version of this resource data as a Darwin Core Archive (DwC-A) or the resource metadata as EML or RTF:

Data as a DwC-A file download 55,100 records in English (5 MB) - Update frequency: unknown
Metadata as an EML file download in English (10 KB)
Metadata as an RTF file download in English (8 KB)


The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Citizen Science Observation Dataset B (2020): Biodiversity4all Research-Grade Observations. v1.0. BioDiversity4All. Dataset/Occurrence.


Researchers should respect the following rights statement:

The publisher and rights holder of this work is BioDiversity4All. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 2bf7b2c0-34dc-4458-8ee4-4f99fac03b33.  BioDiversity4All publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Portugal.


Occurrence; Observation; Citizen Science; Biodiversity


Who created the resource:

BioDiversity4All Citizen Science Observation Dataset
BioDiversity4ll Av. EUA 27-2D 1700-164 Lisbon Lisbon PT 919860311

Who can answer questions about the resource:

Patrícia Tiago
BioDiversity4ll Av. EUA 27-2D 1700-164 Lisbon Lisbon PT 919860311
Inês Rosário
BioDiversity4ll Lisbon PT
Cristina Luís
Direction Board
BioDiversity4ll Lisbon PT
Filipe Ribeiro
Direction Board
BioDiversity4ll Lisbon PT
Luís Ferreira
Direction Board
BioDiversity4ll 1700-164 Lisbon Lisbon PT

Who filled in the metadata:

Patrícia Tiago
BioDiversity4ll Av. EUA 27-2D 1700-164 Lisbon Lisbon PT 919860311

Who else was associated with the resource:

Patrícia Tiago

Geographic Coverage

The geographical area of ​​BioDiversity4All is Portugal however, the global observations of iNaturalist users associated with BioDiversity4All are also part of this dataset.

Bounding Coordinates South West [-90, -180], North East [90, 180]

Temporal Coverage

Start Date / End Date 1970-01-02 / 2020-02-25

Sampling Methods

No Description available

Quality Control BioDiversity4All as an iNaturalist node follows the same methodology. iNaturalist observations become candidates for Research Grade when they have a photo, date, and coordinates. They become Research Grade when the community agrees on an identification. If the community has multiple opinions on what taxon has been observed, iNaturalist chooses a taxon from all the proposed taxa (an implied ancestor taxa of the proposed taxa) that more than 2/3 of the voters agree with. The full algorithm is as follows: for all identified taxa and the taxa that contain them (e.g. genus Homo contains Homo sapiens), score each as the ratio between the number of cumulative IDs for that taxon over the sum of the cumulative IDs, the number of more conservative IDs added after the first ID of that taxon, and the number of IDs that are completely different (i.e. IDs of taxa that do not contain the taxon being scored). For the identified taxa that have a score over 2/3 and at least 2 identifications, iNaturalist chooses the lowest ranked taxon as the community taxon. An observation can lose Research Grade status if the community has voted it down on several metrics, including whether the organism is wild / naturalized (i.e. not captive / cultivated), whether the location and date seem accurate, and whether the content of the observation is appropriate for the context (e.g. violation of iNaturalist's Terms of Service, copyright violation, plagiarism, etc.). To learn more about data quality on iNaturalist, see

Method step description:

  1. Observation recorded and verified by the community