This is taken from the MI DNR website: http://www.michigan.gov/dnr/0,1607,7...747---,00.html

Recreational Trespass
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Trespassing is illegal and seriously erodes support for recreational hunting. Permission is required from the landowner or leaseholder before you may hunt on any farmlands or connected wood lots or on any fenced or posted private lands. Landowners may grant verbal permission. Hunters are required to produce their hunting license to landowners upon request.

If you wound an animal or bird and it runs or flies onto private property, you have no legal right to pursue it without permission of the landowner. Without permission of the landowner, you are trespassing and subject to prosecution.

Again it's clear. Get a pic if you can but call the law.