How to Field Judge Game

Field judging is identifying and assessing a live animal, often at a distance and quickly, before deciding whether to shoot. The Alaska Bowhunter Safety Course calls wildlife identification a basic requirement for every hunter, because mistakes can mean an illegal kill of game or non-game animals. This guide covers what to judge and how, following that course. Legal animals (species, sex, antler rules) are set by your state and unit; check them first.

What you’re judging

• Species: differences can be subtle, such as ear size or colouring (Alaska course).
• Sex and legality: some units restrict the bag to one sex, and in some species both sexes grow antlers.
• Maturity: whether the animal is an adult, a yearling or a fawn or calf.

Adult deer vs. fawns

The Alaska course reproduces the National Deer Association’s guide to telling adult white-tailed deer from fawns:

• Fawns: short, square bodies (“like a briefcase from a distance”), short necks with little muscle, ears that look large for the head, and a head more rounded between the ears; they rarely show a swayed back or sagging belly.
• Adults: larger, rectangular bodies (“like a suitcase”), with the head flatter between the ears.

Antlers and horns (Alaska course)

• Antlers (deer, elk, moose, caribou) are solid bone, shed every year, and grow from the tip. Except in caribou, only males have them. In whitetails, antlers grow tines from a main beam, and maximum antler size comes at about 5 to 7 years; mule deer antlers branch more equally.
• Horns (bison, sheep, goats, pronghorn) are hollow, grow continuously from the base and don’t regrow if broken. Female sheep have small half-moon horns, while rams’ are longer, heavier and curl around the head.

A hard case: caribou

The course notes most cow caribou carry antlers from June through April, and young bulls often can’t be told from cows by antlers alone. Its recommended test for a bull is the presence of a penis sheath; on cows the vaginal opening is visible from behind, and the white rump patch is wider on cows than bulls. Cows and young bulls can look alike when their tails are down.

Tools and patience

Use binoculars or a spotting scope from a steady rest; our how to glass for game guide covers technique. Take time to look at the whole animal from more than one angle. If you can’t confirm that an animal is legal, don’t shoot.

The decision

When the animal is legal and you’ve decided to take it, the shot itself matters most: the Alaska course says to take only a shot that reliably reaches the vital area and pass up anything less. Our shot placement tool shows where, and our big game pages cover each species.

Sources

• Alaska Bowhunter Safety Course (bowhunter-ed.com): Developing wildlife identification skills, Identifying types of deer (including the National Deer Association’s adult-vs-fawn guide), Identifying legal caribou and Proper shot placement. Read 28 October 2026.

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