No, but they can use body language to communicate to each other.
Yes. They compete with each other for prey such as aphids, mealy bugs, mites, scales, and whiteflies. If they've no other food source, then they turn on each other. This is particularly a problem with Asian ladybugs. These non-natives are out-competing native ladybugs for prey. And they consider native ladybugs prey.
Yes. Ladybugs, in general, are fine with sharing a space with another ladybug, as long as there aren't an uneven amount of each gender; if so, they could fight over the ladybug.
In order to stay warm, ladybugs will huddle in masses with each other. Or they bury themselves under piles of leaves or under rocks.
Of course, mice can talk to each other.
Yes, ladybugs [Coccinellidae] will eat each other. In fact, cannibalism is a major threat to native ladybug populations in the United States of America. They're being outcompeted for food sources by Asian or Japanese ladybugs [Harmonia axyridis], which consider the natives prey.
Yes, they are good luck, Not only are they great to have in your gardens, interesting to watch and pretty, ladybugs make good things happen. Right off they put a smile on peoples faces. People giggle like kids when they hold them and talk about things that they remember seeing ladybugs as kids. They open up old discuccions with each other and come away feeling a little better for it. Yes, ladybugs are good luck.
Because the people that talk about other people like them
white sided dolphines talk to each other by clicking
Ladybugs eat other insects and their larvae.
They reproduce as normal ladybugs do. They have other diffrences
Yes, ladybugs need eachother. Not tecnachly but if you want a good garden you should have at least 2. If not they cant mate or have babys the garden in wich its living in will fail miserably.
yes bacteria can talk to each other