National Zoological Park

National Zoological Park

The National Zoological Park, commonly known as the National Zoo, is one of the oldest zoos in the United States. The zoo is part of the Smithsonian Institution and does not charge admission. Derived from Wikipedia licensed CC-BY-SA.

Open Access statistics for National Zoological Park, United States, covering academic research published from 2000 to 2024. Read More.


Open Access Percentage

54%


Total
Publications

2.7K


Total Open
Publications

1.5K


Total
Citations

122K


Open Access
Percentage

54%


Total
Publications

2.7K


Total Open
Publications

1.5K


Total
Citations

122K

Wikipedia

Website

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Breakdown

22% 25% 6% 47%

Publisher Open

22%

Both

25%

Other Platform Open

6%

Closed

47%

Percentage of Open Access over time

0%10%20%30%40%50%60%70%80%90%100%
2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024

Publisher Open

Both

Other Platform Open

Closed

Volume of Open Access over time

020406080100120140160180200Total Publications
2000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024

Open

Closed

Publisher Open

51%OA Journal

OA Journal 51%

635

Hybrid 21%

259

No Guarantees 28%

354

Other Platform Open

Domain 62%

516

Institution 43%

356

Other Internet 25%

205

Public 10%

80

Preprint 1%

12

Other Platform Locations

Name

Platform Type

Publications

PubMed Central
Domain
515
DOI
Other Internet
152
Figshare
Public
68
Unknown Repository
Other Internet
64
Europe PMC
Domain
45
Spanish National Research Council (CSIC - DIGITAL.CSIC)
Institution
36
Elsevier - Scopus
Institution
33
U.S. Department of Energy Office of Scientific and Technical Information - OSTI OAI
Institution
27
Le Centre pour la Communication Scientifique Directe - HAL - Diderot
Institution
26
DANS - Data Archiving and Networked Services
Institution
22
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Data updated 18 August 2025

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