1. | in-situ methods for conservation of biodiversity |
2. | ex-situ methods for conservation of biodiversity |
3. | always parts of some national park |
4. | solitary secluded areas where human movement is forbidden by law |
1. | 5 | 2. | 10 |
3. | 25 | 4. | 50 |
1. | 12 | 2. | 23 |
3. | 31 | 4. | 32 |
1. | Destruction of habitat |
2. | Invasion by alien species |
3. | Keeping animals in zoological parks |
4. | Over-exploitation of natural resources |
1. | Mammals | 2. | Amphibians |
3. | Birds | 4. | Reptiles |