Are These Insects

Question

I noticed red insect like thing stick on the back of leaves and black spots like things on stem of areca palms what are these?

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Answer 1

Now That I see a picture, it looks like red aphids. This isn't the only color that they come in. It still isn't quite perfectly clear, but that's what it looks like.

https://www.gardeningknowhow.com/plant-problems/pests/insects/homemade-aphid-control.htm