Netted fat balls trap birds; blocks and mealworms don't

A cold morning can make a mesh bag of fat balls look convenient, but nets can trap claws or beaks and damp food can attract rats.

Start with the bird and feeding place

Choose food by where birds naturally feed: tits and starlings cling to hanging feeders, while robins, blackbirds and pied wagtails prefer a table, tray or low dish.

Match food to the feeder

Use mesh-free balls in a rigid fat-ball feeder, blocks in a secure holder, and mealworms in a shallow dish.

Remove every retail net before feeding because it can catch a bird’s foot, tongue or beak.

Compare suet balls, blocks and mealworms

Suet balls, fat blocks and mealworms are not interchangeable foods: balls provide quick cold-weather energy, blocks stay stable in holders, and mealworms attract birds that rarely use hanging feeders.

Suet balls: best for cold days

Choose balls with a clear ingredient list and no added salt; use only mesh-free products.

Blocks: best in wind and rain

A block suits an exposed garden when held firmly under cover, but remove it if rain leaves wet edges.

Mealworms: best for table feeders

Offer dried or live mealworms in small portions, and discard soaked or leftover food the same day.

Check the label rather than assuming that every product sold as suet has the same value. A good fat-based food should name its main fats and list additions such as insects, seeds, peanuts or cereal flour, while avoiding added salt. More visible insects can make a mix more attractive to some birds, whereas seed-heavy balls may appeal to a broader range of garden visitors. Peanut-containing products are useful for many birds but should be clearly labelled for anyone handling the food with an allergy.

Compare the ingredient list, best-before date and storage instructions, and avoid products with an unspecified blend of fillers or a stale, oily smell before they reach the feeder.

Suet pellets are a useful fourth format when you want the energy of a fat food without committing to a full ball or block. They can be placed in a sheltered tray, a shallow feeding dish or a purpose-made feeder, making portion control easier after rain or in warmer weather. Small pellets may also suit birds that pick food from table feeders, although larger clinging birds can still take them from a hanging feeder.

Use only enough for one day in damp conditions, especially when feeding robins and blackbirds on a tray. If you use a fat block feeder, keep pellets separate rather than packing them into a holder designed to grip a solid block.

Weather and hygiene decide when to stop

Remove food when it is wet, greasy, mouldy, fouled or stale-smelling, even if it has been outside only briefly.

Wash feeders after fouling

Wash feeders with hot soapy water, rinse and dry them fully, and move the feeding spot occasionally to limit disease and rodents.

Heat changes the rule

Inspect fat daily above roughly 15 to 20°C, and remove food that is soft, oily or rancid-smelling.

Garden bird food can be offered throughout the year, but the portion should follow both the season and how quickly birds eat it. Cold-weather bird feeding is when suet balls and blocks are most useful because their fat provides concentrated energy. In spring and during the breeding season, offer smaller, fresh portions and add mealworms for insect-eating visitors; clear any uneaten worms before nightfall. During moulting, a varied supply can help birds such as robins and blackbirds as well as regular feeder species.

In mild summer weather, reduce fatty food, keep it shaded and make bird feeder hygiene a daily priority. Feeding tits and starlings in hanging feeders may remain successful year-round, provided food stays dry and fresh.

Questions & answers

Are suet fat balls good for birds?

Suet fat balls are good when they are mesh-free, fresh and offered in a rigid feeder, especially in cold weather.

What is the best way to feed mealworms?

Feed mealworms in a clean shallow dish, using one to two tablespoons at a time and clearing leftovers daily.

How long can fat balls stay outside?

They may stay out for two to three cool, dry days, but inspect them daily in rain or mild weather.

Can i feed fat balls to my budgie?

No, fat balls are too fatty to be a suitable staple diet for a budgie.

For an unwell wild bird, repeated deaths at a feeder, or a companion bird with dietary problems, contact a vet or an appropriate wildlife professional for case-specific advice.

Which choice is best for your garden?

For most English gardens, start with mesh-free suet balls in a rigid feeder, then add mealworms for robins, blackbirds or wrens using a table or tray.

Pick one clear starting point

Choose balls for tits and starlings, a block for wind, and mealworms for ground or table-feeding birds.

Pause feeding if food is ignored, repeatedly gets wet, or attracts persistent rats.

• Your UK bird table may be spreading disease
• Stop moving a new feeder before birds find it

Editorial Team

Our team consists of passionate British birdwatchers and garden wildlife enthusiasts. We provide honest, practical advice on feeding garden birds, choosing the right feeders, and making your outdoor space a haven for UK wildlife — guided by RSPB best practice and real garden experience.