1. The avifauna or collection of bird species found in a particular region, habitat, or geological period
The ornithofauna of the Amazon rainforest is remarkably diverse, containing thousands of bird species.
A ornitofauna da floresta amazônica é notavelmente diversa, contendo milhares de espécies de aves.
2. The study or scientific classification of birds within a specific ecosystem or time period
The paleontologist analyzed the ornithofauna from fossils found in the Mesozoic layer.
O paleontólogo analisou a ornitofauna a partir de fósseis encontrados na camada mesozoica.