Birds are at risk in sub-zero temperatures, with gardeners and wildlife lovers doing what they can to help. Feeders come in all shapes and sizes, but according to the RSPB, there is one in-particular that's "safest" for filling with nuts.

These are nut feeders, often constructed from rigid steel mesh. This, the organisation provides the "only safe method of offering nuts to wild birds." It continued: "Seed feeders are designed for sunflower seeds and seed mixes labelled feeder seed. Make sure all feeders drain easily and do not allow build-up of old food." Gardeners should ensure their bird feeders, are safe, secure, regularly topped up with a fresh intake of food, and positioned in a quiet place where wildlife will not be disturbed while eating. The RSPB urged caution over the placement of feeders, especially near large shrubs or bushes where predatory animals could be lurking.

What should I feed birds in winter?

Experts at Love the Garden have listed all the items that can be placed into feeders and bird boxes throughout the colder months. These include sunflower and Nyer seeds. Black sunflower seeds are the preferred option because of their higher oil content. "Sunflower hearts and crushed seeds are great in winter as the birds do not need to waste energy removing the husks, with the added benefit of leaving less mess behind," according to Love the Garden who said tits and greenfinches are renowned for favouring these seeds.

Peanuts, a firm favourite among humans, are also on the list; but they come with caution. Salted or dry roasted variations could harm birds, so it's best to leave those in the kitchen cupboard. Peanuts that are fresh and from feed shops are best - with an array of birds taking fancy to them, especially when crushed up. Fruit, while an obvious one due to the known benefits is also on the list. Apples, pears and plums are especially nutritious for birds due to their high water content. They can be cut in half, left on a bird table or on the ground. Robins, blackbirds, thrushes and waxwings are often attracted to these.

How often should bird feeders be cleaned out?

In short, the answer is every time they are refilled. The RSPB recommends: "Brush off debris every time you put out fresh food and scrub feeders with mild disinfectant solution weekly. Move the feeders from time to time to stop droppings building up underneath." Bird baths or water containers should also be rinsed out daily and replenished as birds use these not only to drink, but fluff up their feathers to keep warm.