Western Lowland Gorilla (IMAGE) Wildlife Conservation Society Caption Buka, a silverback western lowland gorilla in Republic of Congo's Nouabale-Ndoki National Park. Researchers now estimate that there are more than 360,000 western lowland gorillas in the wild, approximately one third higher than earlier figures. However, those same populations are declining by 2.7 percent annually. CREDIT: Zanne Labuschagne/WCS. Credit Zanne Labuschagne/WCS Usage Restrictions One-time usage only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.