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Returns the current version number of the IUCN Red List of Threatened Species API.
rl_api_version(key = NULL, ...)
API version as character string.
(character) An IUCN API token. See rl_use_iucn().
rl_use_iucn()
Curl options passed to HttpClient.
Red List information and statistics: rl_citation(), rl_sp_count(), rl_version()
rl_citation()
rl_sp_count()
rl_version()
if (FALSE) { rl_api_version() }
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