Place
- United States29
- California23
- San Mateo County (Calif.)17
- Cuba16
- Vietnam16
- Albania15
- Bangladesh10
- India10
- Swaziland10
- Kyrgyzstan9
- Nicaragua9
- South Africa9
- Papua New Guinea8
- Saint Vincent and the Grenadines8
- Connecticut5
- Don Edwards San Francisco Bay National Wildlife Refuge (Calif.)5
- Maine5
- Massachusetts5
- New Hampshire5
- Rhode Island5