In the United States, they are must commonly called ladybugs. In other English-speaking countries, they are more commonly called ladybirds. A more accurate name for them is lady beetle or ladybird beetles, since they are not technically "bugs."
In Europe, USA, Canada, Australia and New Zealand, the most common species of bee is probably Apis Mellifera. In the rest of the world it is probably Apis Ceranae.
Apis Mellifera
Do you mean Red Mason Bee? The scientific name is Osmia Rufa.
The most minescule species of bird in the world is the Bee Hummingbird of Cuba.
Apis Mellifera
Adelie penguins are the most common species in Antarctica.
A worker bee is not a species, it is a caste within a species, so its species name is the same as the colony to which it belongs.
The most common species of dog as a pet is a labrador retreiver.
Bees belong to the insect superfamily, Apoidea, which comprises an astounding 20,000 bee species. Although each distinct bee family exhibits common traits, such as nest building, social behavior characteristics, and the like, different species have different physical shapes and characteristics.
Butterflies
In Europe, Australia and North America the most common honey bee is Apis Mellifera.
There are a wide variety of bee sting treatments out there, but the most common of them all is icing the sting and taking an anti-histamine. Combining both will yield the best results.
Species have the most in common.