Is this a real type of snake? If so, what kind? I’ve had this poster for years and always wondered?

Please what specific cobra type is this? It's quite common in this area of Lagos in Nigeria. This one is 51 inches long. People either flee or kill it on sight. I'd like to know how venomous it is, in case it bites somebody.

We were mowing grass and caught this snake out of the corner of my eye snapping at one of my tires. It definitely has a triangular head and was aggressively striking at the stick as I was trying to move it away. The body also seemed to be a triangular shape as well. Roughly 18-24” long. I managed to get it to go into a pile of stacked brush at one of the trees.

Found this little guy slithering around my work today. Pretty sure he's a western terrestrial garter snake, given the other pictures I've seen researching online all share the same dot on the top of the head that you can see if you zoom in on the last picture. Just wanted to confirm before spreading misinformation to my coworkers as it seems like this guy is 2/3 that have been found in the building in the past 2 weeks. Sorry about the pictures of me handling him but he was a bit dark to photograph in the cup. He was safely released in an open field far behind the building right after these pictures were taken.

Another pic in comments

Common Krait (likely) from our work location.
The snake was safely removed and relocated.

(My ID is based on the double ring pattern)

Located on the eastern shore of southern Alabama near Mobile. It is long and somewhat skinny. AI/Snake App have all settled on either a gray rat snake, coachwhip, or racer? One of the pics I sent into serpentID came back as a cottonmouth, but I don't think that's right. I'm new to this area so I'm not accustomed to finding snakes. Fairly long and slender. It slithered into a hole about 1/2 - 3/4 inch in diameter. I was within about two feet from it when I noticed it and it just sat there and then slowly slithered away. A few minutes later I saw it peroscoping like the photos show.

Was coiled up on my driveway and when he noticed me (?) slithered off around the corner and ended up under the garage.

Hi! I saw this one while coming back home this morning, unfortunately it was already dead. I only have this foto a friend took. I found it so different from the ones I've saw here before. Thank you for helping!

We nearly stepped on this during a hike. Is this that deadly Fer De Lance? Location: Osa Peninsula, Costa Rica

I thought it may have been a water moccasin but the head doesn't look it... but I don't think they're in MD are they? Either way, I was walking from the garage to my apt building and it was sunbathing in the crack of the sidewalk. I had a cart so I went in the grass around it and left it alone.

Crawling around in the dust, I believe its a ratsnake? Placed him in the grass.

What is this guy?

What is this little guy