I found it in wikipedia.org not as Rana angolensis, as on the postcard, but as The Angola River Frog or Common River Frog (Afrana angolensis).
"Gheorghe Vrabie - 85 years since his birth" postmark on prepaid cover from
Moldova
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*TAD "Gheorghe Vrabie - 85 ans de sa naissance" sur enveloppe pré-timbrée
de Moldavie *
Le 21 mars 2024, la poste moldave a mis en circulation un TAD con...
15 hours ago