Hi

So many factors have to be taken in to account ...

Flowers such as daffodils last longer (in flower) when the weather is cool .... most pollinating insects dont fly in low temperatures.
Narcissus pseudonarcissus (native British daffodil) all the rest are produced by plant breeders for how they look ie colour form height etc so it doesn't mean its a good producer of pollen or nectar to pollinating insects to take advantage off.

I have a good example in my garden I have two apple trees different variety's both flower at the same time and the bees prefer one tree to the other so they know best, to me the flowers look identical.

Ps not that I am a botanist but I do keep honey bees.

Gg

I really don't believe flowers are lasting longer than they used to - certainly, the daffodils here in the south were out about a month ago and lasted the expected 2-4 weeks, largely because some come out sooner than others. They've been looking shrivelled and brown headed for the last couple of weeks, all over for this year. I've certainly not observed anything lasting longer than one might expect, taking into account weather conditions.

I have, though, observed a decline in some pollinating insects when compared with 15 years ago, in particular, bees and even wasps, at the same time as observing a significant increase in the amount of wind we get throughout the year, along with thunder being much more common year round.

We've had daffodils and species narcissus in flower for well over a month now but I don't think the actual individual blooms are lasting any longer than usual; simply that we have so many bulbs that there is a succession of flowers. Given that March is now as mild, if not milder, than May with us it all seems pretty normal.

Probably just a faulty memory. My Spiraea arguta are coming into bloom and I would have said they came after the daffodils were finished.

Well, flowering time varies from year to year - some years, most of its out all at once, other years there's gaps between - in 2015, the daffodils came out in December here, all finished by January 2016. Even some apple trees flowered in December that year, but if the spring is sunny and warm, especially after a cooler winter, you usually find lots of things flowering in a rush, all at once. I'm just looking at my bottlebrush plant - it will be in flower by Easter by the looks of it, but it never usually flowers till mid May.