Any sign that this 85 million year old event was damaging to the animal life of that time?
They probably all banged their heads when they fell over.
The axis of rotation for a planet changes up to 15 degrees in a 50-100 year period. Our magnetic poles today aren’t where they were 10 years ago. This is normal.
The biggest effect to life is exposure to cosmic radiation. The poles are giant funnels. Exposure to solar and cosmic radiation is much higher at the poles than anywhere else, because the atmosphere is thinner and dips in like a funnel, hence the aurorae.
If the poles were to dip down around the tropics, equator, or even flip, the areas where the magnetic orientation is null will experience high levels of radiation. Humans would do best to stay indoors if that happens anywhere near them.
Well, some fell off when it tipped over..................