Individual variation in the booming calls of captive Horned Guans (Oreophasis derbianus): an endangered Neotropical mountain bird

Earth & Environmental Sciences

• individual variation 60%
• bird 39%
• captive population 39%
• acoustics 39%
• cloud forest 32%
• vocalization 31%
• mountain 31%
• breeding season 30%
• species conservation 30%
• wild population 30%
• monitoring technique 29%
• endangered species 26%
• census 23%
• test 9%

Agriculture & Biology

• Oreophasis derbianus 100%
• mountains 39%
• birds 29%
• acoustics 23%
• census data 16%
• tropical montane cloud forests 15%
• Guatemala 14%
• vocalization 12%
• courtship 12%
• endangered species 11%
• breeding season 10%
• Mexico 9%
• monitoring 7%
• methodology 6%
• testing 4%