Many snake species use constriction as a hunting method. But only some species from the Boa and Python family may pose a threat to humans. The following rating is based purely on the maximum species length. Nonetheless, it generally matches with case reports of constrictions. Zoological gardens also calculate with one-man-per-meter snake length to safely control a constrictor snake.
| ID | Constriction Rating | TBL Range | Description |
|---|---|---|---|
| 1 | harmless constrictor | < 100 cm | Small constrictors such as Eryx vittatus are no threat to adult humans. They can still be dangerous around small children or other small pets. Even small constrictors should be never put around somebodies neck! |
| 2 | potentially dangerous constrictor | >= 100 cm < 200 cm | Mid sized constrictors such as a full grown Corallus annulatus can be dangerous to adult humans under certain conditions. It is advisable to handle them with care, ideally with two people. |
| 3 | dangerous constrictor | >= 200 cm < 400 cm | Large constrictors such as Liasis olivaceus are considered dangerous to adult humans. Specimens of this size are known to have killed adult humans in the past. |
| 4 | very dangerous constrictor | >= 400 cm < 600 cm | Very large constrictors such as Python bivittatus are considered very dangerous to adult humans. Specimens of this size have killed and sometimes even devoured humans. |
| 5 | extremely dangerous constrictor | >= 600 cm | Typical prey items for species such as Eunectes murinus or Malayopython reticulatusare often of comparable size as adult humans. Always consider yourself as a potential prey item if you encounter one of these massive constrictors. |