1. Plural of avifauna; the birds of a particular region, period, or environment.
Usage: Technical term used in ornithology and ecology; Typically used in scientific or academic contexts

Examples

• The avifaunas of tropical rainforests are remarkably diverse.
• Researchers compared the avifaunas of different continents to understand migration patterns.
• Climate change is affecting the avifaunas in coastal regions worldwide.
• The island's avifaunas include several endemic species found nowhere else.
• Conservation efforts focus on protecting the avifaunas of endangered ecosystems.