There's nothing good on TV so you've decided to take over the world.
The good news: you can have complete telepathic control over a whole species* of animals! That should be useful. Here's what you can do: when you start using the power all the animals of the species go to "waiting for commands" mode*. Doing what you say is on them, so you can give them any task *that they can comprehend**. (I.e. you can't tell a fly to solve a puzzle, you'd have to tell it where to turn each time. You could tell a bee to make honey) this includes "act normal".
When you provide instructions, selecting who this applies to is on you. So you can say "every third male animal which is in Africa or over a source of water do X) As long as you know what you want.
What you want: world domination!. It doesn't have to be formal, as in being the supreme president (?) and have boring government meetings. The key word here is power. You should be able to do whatever you want and have people obey you. don't assume this will be easy. People may fight back if they see fit. It's not necessarily about making the strongest army and finding animals capable of destroying the world, because a) you don't want to destroy the world and b) that might piss people off, and if they kill you, well, that's not good.
People won't necessarily know what you can do (you can tell them) but keep in mind that you want power, and for that people need to treat you a certain way (or do they?)
What's the best plan you can find?
*The definition of a species is pretty arbitrary. Just go with anything that most people would agree are the same animal.
**this is why you can't use humans. You will also go to waiting mode (as you're a human) and no commands will ever come
The question isn't which species is able to make the most damage. I was looking for something a little more elaborate. You want to have control and to have people do what you say. If you try to ruin the world people would try to stop you, if they know it's you, or just ignore you if the don't.