I don't think that is true. It's like saying a blonde is dumb, but they aren't. But female budgies are more aggressive than males.
male-blue, grey, black, white female-green, yellow, black, white
budgies can be different clolours like blue white and yellow
Budgies in their native habitat are green and yellow, although for pet budgies there are now other colors including but not limited to: Sky blue, White, Violet, Olive, Turquoise. Budgies usually have at least two of these colors in a pattern such as Opaline, spangled or cinnamon.
any animal can be aggressive
Budgies vary tremendously, and it is one of the reasons why breeding budgies is so entertaining. The resulting babies could be green, grey, pied green-grey or something quite different, like a blue, depending on the recessive genes.
Canaries are typically larger than budgies, with longer bodies and tails. Canaries also have a more melodious song compared to the chirping of budgies. In terms of colors, canaries come in a wide variety of shades, while budgies usually have a mix of green and yellow feathers.
blue and white or green and yellow
=NO=
Well, there is few colors which comes under aggressive colors:- Red Fluorescent Pink Orange Yellow Blue Black
sparrows, finches, budgies, cockatiels, blackbirds, thrush, canaries, chickens, yellow heads
Yes. All wasps sting, some species are less aggressive than others but the paper wasp is quite aggressive and protective of their territory. It is a very painful sting. Paper wasps feed spiders to their young, and they use it for that, but they do not hesitate to sting people in proximity with their nests.
If the female carries the recessive gene necessary for yellow coloring, about 50% of the time. If she does not, never.