How to measure the jaw spread of a foothold trap

Understanding trap Measurements in Best Management Practices (BMPs)

There is currently no common way to connect the mechanical design features of traps with their sizes and names. However, the Best Management Practices (BMPs) for trapping provide information on the jaw spread of traps, which aids in identifying similar types. Two measurements are used for this purpose: the inside jaw spread and the hinge post width

Inside jaw spread

The inside jaw spread is the primary measurement used to determine the size and legality of a trap. First, open the trap fully and ensure that the trap is completely open before taking any measurements. Then use a ruler or measuring tape to measure from the inside edge of one jaw to the inside edge of the opposite jaw at its widest point.

This measurement is essential as it indicates the trap's effectiveness in capturing animals and is often subject to legal regulations.

Hinge post width

The hinge post width is a secondary measurement taken between the two jaws at the point where they connect to the hinge posts. While it is not frequently used for regulatory purposes, this measurement can be helpful in identifying specific trap models.

Importance of accurate measurement of foothold traps

Many states have implemented regulations governing the maximum jaw spread for traps used in land sets. These rules aim to enhance trap selectivity and minimize the risk of capturing non-target species. By limiting jaw spread, states seek to ensure that traps are appropriately sized for intended furbearer species while reducing potential harm to wildlife and domestic animals.

Selecting the appropriate trap size is fundamental for effectively and humanely capturing various target species.

• Smaller animals: Species such as muskrats and minks require smaller traps, typically with jaw spreads of 4-5 inches.
• Medium-sized animals: For animals like raccoons and foxes, traps with jaw spreads of 5-7 inches are suitable.
• Larger predators: Coyotes and bobcats necessitate traps with jaw spreads of 6-8 inches.
• Largest furbearers: For larger animals like wolves and beavers, traps with jaw spreads of 7-9 inches are appropriate.

Using the correct trap size ensures that the animal is caught securely without causing unnecessary injury. As a general rule, always opt for the smallest trap necessary to capture your target animal, as smaller traps reduce the likelihood of accidentally trapping larger, unintended animals.