Trail camera questions, answered

In cold weather and for long deployments, usually yes. Energizer rates its lithium AAs for -40°C to 60°C against -18°C to 55°C for its alkalines, and Bushnell recommends lithium.

Source: Energizer L91, Energizer E91, Bushnell manual

Check your manual. NiMH cells are 1.2 V, not 1.5 V, and some makers (such as Bushnell) don't recommend them.

Source: Energizer NH15, Bushnell manual, Trailcampro

Usually moving vegetation, sun on the sensor or a swaying mount. Clear plants, face north if you can, and lower the sensitivity.

Source: Moultrie, Reconyx

PIR works best when animals cross the detection zones side to side.

Source: Trailcampro

Low glow gives more range and clearer night images. No glow is invisible to people, which suits security, but it costs range and sharpness.

Source: NatureSpy, Trailcampro

Infrared lighting can only give monochrome images. Colour at night needs white flash.

Source: Trailcampro

Not necessarily. Many figures are interpolated from a much smaller sensor.

Source: Trailcampro, NatureSpy

The type and maximum size your manual lists (some cameras only take up to 32 GB SDHC), Class 10/U1 or faster, U3/V30 for 4K. Format it in the camera.

Source: Bushnell manual, SD Association, Spartan

Check Ofcom's Map Your Mobile for your postcode, then confirm with the camera's own signal meter on site.

Source: Ofcom, Bushnell manual

Normally yes. Each camera needs its own active plan.

Source: Bushnell manual

No. UK 3G networks have been switched off.

Source: Ofcom

iRecord (records with photos, verified and shared with recorders) and MammalWeb (camera-trap uploads).

Source: iRecord, MammalWeb

It isn't automatically illegal, but once your camera captures anything beyond your boundary, UK data protection law applies: you need a clear reason, signs, minimal coverage, secure storage, regular deletion and to handle requests from people filmed. Angling the camera to stay within your garden avoids all of this.

Source: ICO – Home CCTV systems

No. Hedgehogs aren't a licensed species for filming, and Natural England says you don't need a licence to film wildlife you don't disturb.

Source: GOV.UK – Protected species licence guidance

Disturbing a badger occupying a sett is an offence. Natural England says remote cameras are fine if set while animals are away from their resting places and they don't change behaviour; anything that interferes with an occupied sett needs a licence. Keep cameras back, set them in daylight, and talk to your local badger group.

Source: Protection of Badgers Act 1992 s3 · GOV.UK guidance

RSPB advice is to fit cameras before the breeding season and leave boxes alone in spring. Opening an occupied box risks disturbance, and for Schedule 1 species disturbance at the nest is an offence without a licence.

Source: RSPB – Nestbox guide

Usually yes. Audio is treated as especially intrusive, and a 2021 County Court case found a neighbour's audio-capturing cameras breached data protection law.

Source: Inforrm – Fairhurst v Woodard

GOV.UK guidance says it will not be appropriate to share recordings on social media; use footage only for the purpose you installed the camera for, and give it to the police if it shows a crime.

Source: GOV.UK – Domestic CCTV

Meaty wet cat or dog food, hedgehog food or cat biscuits with a shallow dish of water. Never milk or bread.

Source: Hedgehog Street

13cm x 13cm.

Source: Hedgehog Street – Link your garden

Get the landowner's permission first. Badger Trust doesn't recommend setting cameras without it, and cameras in public places may also film passers-by, which brings in data protection law.

Source: Badger Trust – Responsible badger watching

Not formally. It applies to relevant authorities such as police and councils in England and Wales; householders are encouraged to follow its principles voluntarily.

Source: GOV.UK – Domestic CCTV

MammalWeb accepts camera trap images; Mammal Mapper and iRecord take sightings; BTO Garden BirdWatch takes weekly garden lists; the BIG Hedgehog Map logs hedgehogs.

Source: Mammal Society – MammalWeb

The RSPB's July 2026 guidance says pause seed and peanuts from 1 May to 31 October to reduce disease risk; small amounts of mealworms, fat balls or suet are fine.

Source: RSPB – Latest guidance