2025 Data Gap-Filling Achievements

In 2025, the Taiwan Biodiversity Information Alliance (TBIA) launched a thematic project dedicated to filling data gaps. Working hand in hand with its partner organizations, the alliance targeted different types of deficiencies, including taxonomic gaps, spatial gaps, and temporal gaps. This year, a total of 852 grid cells were filled, including 36 newly completed grid cells! The overall data coverage across Taiwan has now reached 78.97%. The dataset includes 3,838,564 records of protected species, with the top five taxonomic groups being amphibians, birds, ferns, mammals, and fish.
Below is the interactive section showcasing the results of the 2025 data gap-filling initiative. To ensure the integrity of the results, final statistics for all survey records generated in 2025 were compiled and finalized by the end of February 2026.

🧩 Grid Cells Filled

—

🗺️

🛡️ Includes Protected Species Data

— records

Including endangered species 、 precious and rare species 、 other conserved species and rare and valuable plants

🛡️

🔎 Overview of Major Taxonomic Group Filling

The species coverage rate for the top five taxonomic groups, representing the number of species recorded in our data relative to the total number of species for those corresponding groups in the Taiwan Catalogue of Life (TaiCOL).

🗺️ Spatial Data Gap-Filling Status

Geographic distribution of records using 5×5 km grid cells, used to evaluate the geographic coverage and spatial filling status of each biological group. The 2024/2025 comparison feature visualizes annual progress and spatial distribution changes. Color intensity indicates record counts; blue cells highlight "newly added grids in 2025".

Grid filling definition: A grid is considered "successfully filled" when its accumulated records reach 5,000 or more.

Biological Group

Current Gap Rate —

Lading

Number of Records：

5,000 - 10,000

10,000 - 50,000

50,000 - 100,000

New Grids Added as of End 2025

⏱ Temporal Data Gap-Filling Status

Temporal gaps indicate a lack of data during specific periods. These data discontinuities along the timeline can be filled by digitizing archival collections or by promoting the open access of historical and research surveys. The side-by-side bar charts compare the data counts across different years and months, demonstrating the continuity and completeness of the data over time, while also illustrating the current status of temporal data gaps.

Year Range

Biological Group

🕓 Yearly Distribution

📅 Monthly Distribution

Select 'As of the end of 2024' or 'As of the end of 2025' to toggle the annual data display. Click on any bar in the chart to view the historical details of the data filled.

📊 Taxonomic Data Gap-Filling Status

Select "Species Coverage Rate" or "Number of Records" to toggle between different annual statistical results. Clicking on a bar for a specific taxonomic group allows you to further examine the annual variations and data growth.
Note: A gray bar in the chart indicates that the number of species recorded for that taxonomic group in that specific year has decreased compared to its proportion of the total species count in the Taiwan Catalogue of Life (TaiCOL) from the previous year. However, a decrease in the number of species does not equate to a change in the total number of records; it simply reflects that the species recorded in that year were more concentrated.

As of End of 2025

As of End of 2024

Decreased from End of 2024 (2024 shown as dashed outline)

📊

Click a chart bar to view taxonomic data details

🤝 Partner Acknowledgements

Open data is more than just numbers; it is the vital foundation supporting research and conservation actions. Beyond the TBIA partner organizations, biodiversity data also relies heavily on the open data contributed by various institutions and groups. We sincerely thank the following government agencies, citizen groups, academic institutions, and corporate partners for their collective efforts in promoting the accumulation and sharing of biodiversity data in 2025 (listed by category):

Government Agencies

農業部水產試驗所

內政部國土管理署

基隆市政府

NGO & Citizen Science Communities

社團法人中華民國野鳥學會

eBird Taiwan

社團法人基隆市野鳥學會

台灣石虎保育協會

Corporate Partners

羽林生態股份有限公司

研海生態顧問股份有限公司

浸水營生態顧問有限公司

Academic Institutions & Laboratories

中央研究院—綠島長期社會核心觀測站