Recently I have seen interpretations of roadrunner that include agility, quick-wittedness, speed and cleverness. However having lived in Arizona where I came to know roadrunner as the carnivorous, sneaky and sometimes vicious creature it actually is, I find it hard to think of them as an omen of any good at all.
Roadrunner is one word. They are birds. They are in the Cuckoo family of birds. There are 2 types Roadrunner birds: Greater Roadrunner and Lesser Roadrunner.
symbolism
No birds can run besides the roadrunner. However the roadrunner is very fast.
Any strange or unusual events can be thought of as Omen's. Depending on who is reading them they can be viewed as good or bad omens. No reason why a seer would say that birds flying into each other wasn't an omen.
Yes
Actually, the small birds that land on the cacti attract the roadrunner. The roadrunner is an omnivore.
The roadrunner, like all birds, is warm-blooded.
Small birds and snakes.
No. It just means that the parents found a good place for a nest.
Kookaburras are not an omen of anything.
That was not a good omen.
This can be a good or bad omen. If you don't like bees it is a bad omen however if you appreciate their role in nature it can be a good omen.