Velvet Ant!
There are a few small bugs that are triangular in shape namely Troilus luridus, Sloe Bug, Striped Shieldbug, Green Shield Bug.
The caddisfly is a common insect that fits this description. They have white or light-colored bodies and dark wings with a distinctive triangular shape when at rest. Caddisflies are often found near water sources where their larvae develop.
A bug with a black shell and yellow stripes could be a yellow jacket wasp. These wasps are known for their bright yellow and black coloration and can have a striped pattern on their bodies. Yellow jackets are social insects that can be aggressive when their nests are disturbed.
The red striped black bug, whose Latin name is Pyrota Ackhurstiana, falls under this description. It also has a red spot on its head.
The insects you are likely referring to are red velvet ants, which are actually wingless female wasps. They have a bright red or orange body with black wings and are known for their painful sting. They are solitary insects and can often be found nesting in the ground.
The boxelder bug is a black bug whose wings are orange-striped in the shape of the letter "y." The insect in question (Boisea trivittata) sports two sets of wings, with the upper set being edged in orange.
Possibly a banded alder borer? Possibly a banded alder borer?
The name of the orange and black striped bug commonly found in gardens and fields is the "milkweed bug."
The black and red striped bug commonly found in gardens and fields is called a ladybug.
The black and yellow striped bug commonly found in gardens and fields is called a "bumblebee."
The name of the yellow and black striped bug commonly found in gardens and fields is the "bumblebee."
The long skinny black bug with wings is commonly known as a "cockroach."
The name of the red bug with black wings commonly found in gardens is the ladybug.
The bug you spotted in your garden is likely a striped shield bug.
Wasps and hornets
The bug you found in your garden is likely a type of beetle called a ground beetle. They are usually black in color, have wings, and are commonly found in gardens.
The identification of a brown bug with black spots is likely a ladybug. Ladybugs are small insects that are typically brown or red with black spots on their wings.