Frank doesn't sugarcoat it. "People buy a plastic tube, hang it in the garden and think they've done something good. But a lot of feeders out there aren't built with birds in mind – some can actually cause real problems."
What he's observed over 40+ years:
Wobbly perches – Plastic pegs, thin wire loops, tubes that spin in the wind. "Birds land, feel it move under their feet, and take off immediately. They won't come back to a feeder they can't trust to stand still."
Roofs that don't actually protect the seed – "Overhang has to project well past the tray. Most of the shop-bought ones have a lip a couple of centimetres wide. First heavy shower and the seed is wet through. Wet seed grows mould in three days. Mouldy seed makes birds ill."
Single-port feeding – "One perch, one bird at a time. So the birds queue, squabble, and half of them give up before they get near the seed. You want them feeding together, not fighting each other."
Cheap paint and thin metal – "The paint peels in the first year. Once the coating goes, the metal rusts underneath. And birds instinctively avoid rusty surfaces – they harbour bacteria and the whole thing starts to look diseased."
No way to check the seed level – "Most feeders are opaque. You find out it's empty when the birds have already given up and moved to next door's garden. By the time you notice, they've stopped visiting."
"Folks mean well. But without the right knowledge, they can do more harm than good."