Thermal & night vision for hogs

Thermal or digital night vision?

Thermal sees heat. A thermal scope or monocular reads the warmth a hog gives off and shows it against cooler ground, with no light needed at all. ATN puts it this way: a thermal scope "passively detects the heat energy that objects already radiate, which is why it works identically with or without any light present" (ATN). That makes thermal the tool for finding hogs you can't see yet, across a field or along a brush line, and for identifying them before you shoot. It costs more, and the budget models trade reach for a wide view.

Digital night vision is a camera sensor that needs light. On a dark night that light comes from an infrared illuminator, built in or clipped to the rifle, and the scope can only show what the beam reaches. The makers of the scopes we rank claim IR reach of about 200 to 380 yards. In return, night vision costs far less than thermal, most models double as day scopes, and it's well suited to a feeder at a distance you know. Our thermal vs night vision for hog hunting comparison works through the choice.

Sensor tiers: what 256, 384 and 640 buy at hog distances

Thermal sensors come in three common sizes: 256x192, 384x288 and 640x512. The number gets the attention, but the detail on a hog is set by two quieter specs, pixel pitch and lens focal length. Using the makers' published figures and a 5 ft hog, a 256 sensor with 12 µm pixels behind a 19 to 25 mm lens puts about 26 to 35 pixels across the hog at 100 yards. A 384 or 640 with 12 µm pixels behind a 35 mm lens puts about 49 there. What the bigger sensor buys is a wider view at the same detail: at 100 yards, that 35 mm lens shows about 39 feet of ground on a 384 and about 66 feet on a 640. That's illustrative math from published specs, and the best thermal scope for hog hunting ranking shows the working. For the full explainer, read 256 vs 384 vs 640 thermal, and for what the makers' big distance numbers are worth, how far a thermal scope can really see.

In practice: a short-lens 256 is a feeder tool, fine inside about 100 yards. A 384 or 640 behind 35 to 50 mm covers feeder to open field. Digital zoom never adds pixels, so compare lens size and base magnification, not the top zoom number.

Scope or monocular first?

If you don't yet know where and when the hogs are coming in, a handheld thermal monocular is often the smarter first buy. It lets you scan the property and count a sounder without sweeping a rifle across animals, livestock or people you haven't identified. Our best thermal monocular for hunting ranks the scanners, and thermal monocular vs thermal scope helps you decide which to buy first. If you already own a good day scope, a clip-on thermal mounts in front of it and keeps your reticle, and clip-on thermal vs thermal scope works through whether that route or a dedicated scope suits your rifle. Several scanners and clip-ons work both ways.

The budget ladder

• Under $500: handheld thermal monoculars with 256 sensors, and digital night vision scopes with IR. We couldn't verify a thermal riflescope in this tier — the full explanation is on best thermal scope under $500. What does exist here is ranked on best thermal monocular under $500 and best night vision scope under $500.
• $500 to $1,000: 256 thermal scopes with 15 to 25 mm lenses, one 384 with a 35 mm lens, and 256 clip-ons. Ranked in the best thermal scopes under $1,000. On the handheld side this is where 384 scanners start: see best thermal monocular under $1,000.
• $1,000 to $2,000: 384 scopes with 35 to 50 mm lenses, a 640, rangefinders and 9 to 10 hour batteries. The tier most hog hunters should aim for; see the best thermal scope under $2,000, and Pulsar Thermion vs ATN ThOR for its top two.
• $2,000 and up: rangefinders on 30 mm-tube scopes, dual-lens bodies, light 640s and premium clip-ons. More features than more detail.

For what each tier buys, and whether thermal is worth it for your problem, read how much a thermal scope costs. Once it's on the rifle, how to zero a thermal scope gets it shooting where it looks. Every pick on these pages is researched from published specs and manuals; how we choose explains the rubric.

What actually fits the rifle you own

Price isn't the only thing that decides this. Some thermals ship with a Picatinny mount that clamps straight to a flattop AR-15's rail, and some are built on a 30 mm tube that needs a one-piece cantilever mount you buy separately, which adds cost, ounces and height. If your hog rifle is an AR, start with the best thermal scope for an AR-15: it ranks the scopes that need nothing else in the box, with each maker's published mount, weight and recoil rating side by side. If you already own a day scope you shoot well, a clip-on thermal keeps that reticle and your zero. On the cheaper night vision side, the best night vision scope for an AR-15 does the same exercise with published recoil ratings and base magnification, which is where most AR buyers get it wrong.

Handhelds: monocular, binocular or goggle

Not everything goes on a rifle, and the format changes the job. A monocular is the cheap, pocketable way to find and count animals — start with under $500 or under $1,000. A binocular puts an image in front of both eyes, which is far less tiring over a long sit and makes size and distance easier to judge; almost all of them include a laser rangefinder. Nothing in that category sells under the $1,000 tier, which is the honest headline of best thermal binoculars for hunting — and thermal binoculars vs monocular works through whether the second eyepiece is worth the money for you. A goggle straps to your head and leaves your hands free for the walk in, the gate and the trap: see best night vision goggles under $1,000 and best night vision binoculars.

Coyotes on the same ground

Most Texas landowners with a hog problem also have coyotes, and they are not the same target. MDC's field guide puts a coyote at 39 to 54 inches total length with a 10 to 16 inch tail against a hog that runs to 5 feet, and there is far less heat coming off 25 pounds of canine than off a 200 pound boar. That pushes you toward lower NETD and a wider field of view than a feeder rig needs. Best thermal scope for coyote hunting runs the same rubric with those weightings, and night hunting coyotes covers the calling side.

A note on Texas law

On private property, TPWD sets no closed hunting hours for feral hogs and asks night hunters to give the local game warden a courtesy call (TPWD Outdoor Annual). Protected game, including deer, can't be hunted at night, so identify every animal before you shoot, and never hunt from a public road. The night rules are laid out, each one cited, in can you hunt hogs at night in Texas, and licensing, transport and the rest in Texas hog hunting laws.

Optics are one part of the plan

A good thermal takes hogs a few at a time. Texas A&M's Natural Resources Institute reports that removing about 66% of a population every year is needed just to stop it growing (Texas A&M NRI, 2019). That's why the optics here work best alongside trapping whole sounders. Start with how to get rid of feral hogs for the full system.

New on this hub

Four pages added this month. Pulsar Thermion vs Pulsar Talion settles the in-house Pulsar question, where the sensor is identical and the lens, mount and field of view decide it. ATN X-Sight vs Sightmark Wraith 4K Mini does the same for the two digital night vision scopes most people compare, and battery life decides that one. Digital night vision vs analog explains why a "Gen II" badge on a digital scope is a product name rather than a tube generation. And thermal hog hunting tips covers the part no spec sheet does: scanning at base magnification, reading a sounder before the first shot, and the settings that cost people pigs.

Added October 12: Pulsar vs AGM, a brand-level comparison where AGM takes the sensor spec and the battery at every tier and Pulsar publishes a recoil rating AGM leaves blank; and our AGM Rattler V2 19-256 review, a specs-first look at the entry scope most people buy first.

Added October 19 — three more specs-first reviews, each one honest about what its maker leaves out. The Pulsar Thermion 2 XQ50 Pro review covers the scope with the longest lens and the only complete durability sheet in its tier, carried on a 17-micron sensor newer rivals have moved past. The ATN ThOR 6 Mini 256 review covers the entry thermal with the fewest blanks on its spec sheet, and the narrow view and small display that pay for them. And the Sightmark Wraith 4K Mini review covers the compact day-night scope with the best reticle menu at its price — and a rated 3.6 hours on two throwaway CR123A cells.

Added October 26: the RIX Storm S3 384 review. It is the lightest 12-micron 384 we rank, it ships with a quick-detach mount and it carries a five-year warranty — and RIX publishes no ingress rating, no operating temperature range and no field of view for it, while a 640 with a built-in rangefinder sits in the same budget tier.

Added November 2: the Pulsar Talion XQ35 Pro review. The widest close-range view and the toughest published body in its tier - IPX7 submersion, 6000 J, magnesium - set against a 17-micron sensor where its rivals have moved to 12, a blank NETD cell on Pulsar's own spec table, and an operating ceiling of 104°F that a Texas summer clears before lunch.