They have 3- to 5-inch flowers varying in hue from orange, yellow, and white to pink, red, and maroon. And, yes, the seeds left behind when these large blooms fade are quite attractive to goldfinches.

Flavonoids and the carotenoids, which produce the yellow and the orange hues, ... Without ample water, there's less sugar in the trees, which leads to duller fall colors, said Rao.

It means darker, duller birds could have a survival advantage. Skip to content Skip to site index. ... Urban feathers are not as bright, with yellow, orange and red feathers affected most.

The relative effect of the sun's bright golden glare, the gas-flame's duller yellow tint, and the electric-light's moon-like whiteness, on the optic nerve; have not, ...

Some parts of Ontario, including the Greater Toronto Area, experienced higher than normal temperatures in September, and that weather pattern leads to duller colours, experts say.