The name “paper wasp” refers to at least 22 species in the US and hundreds more all over the world. They all look quite similar -- paper wasps have a brownish coloring, with some yellow marks, though some paper wasp species are more reddish in appearance.
Most bald-faced hornets are between ½” to ⅝” long, while a queen bald-faced hornet is almost always ¾” long. They have 6 legs, a pair of wings, and two long antennae.
Vespa crabro (Linnaeus)
The european hornet is a large hornet, ranging in length from ¾” to 1 ½”. Their bodies are brown, with a lighter face and distinct yellow bands around their abdomen.
Carpenter bees have a round body structure similar to bumble bees, but they generally don’t have the same yellow coloring. There is one species of carpenter bee which has the same yellow coloring as bumble bees.
Yellowjackets have large abdomens, with a very thin waist. Their bodies are black and bright yellow. They’re ⅜” to ⅝” long, although the queens are generally larger.
Honey bees have a golden-yellow abdomen, with thinner brown or black stripes. Their bodies are covered in small hairs, but they don’t look as robust as a bumble bee.
Bombinae (subfamily), Bombus (species)
Bumble bees are black and yellow winged insects which are about 1” in length, and have two antennae. They have small hairs all over their bodies that collect pollen.