Aligning a Particle to the Surface It Collides With

I'm making a moth particle with a sub-emitter intended to look like the moth lands when the first particle collides with a 3d object in the scene. It looks fine when it lands on a flat surface but on an uneven surface like this sphere, the moth lands flat and hangs in the air unnaturally.

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How can I make the particle align with the surface it lands on (or is nearest to) so it looks more natural?

Any incite is appreciated