From Tnducks: Duxrus @ Wild Wings taxidermy
I get asked many times each year "How do I take care of my bird before getting it to you" ?
I would suggest just buying a box of 1 gallon ziploc bags and putting some in your blind bag "just incase". Once you have your trophy in hand let it cool off for about 10 minutes before putting it in the ziploc. Drop it in and make sure it's head and neck fold up against the body. Now it is protected on the trip back home and ready for the freezer.
If you aren't sure how long you will have it in your freezer before handing it off to a taxidermist, I would go one more step in protecting it. Once frozen with the head and neck up against the body, take it out of the bag. Wrap it in about 10 WET paper towels, making sure the head and legs are covered and re-freeze. This will create an ice barrier and add years to the bird's shelf life. This trick will protect from freezer burn that will start showing signs after a year or so in the freezer.
Do NOT's......
Use those cheap grocery store bags (zero insulation or protection from freezer burn)
Wrap in DRY paper towels (will suck the moisture out of the bird and speed up freezer burn)
Wrap in News Paper ( Will suck the moisture out of the bird and has potential to leave ink on bird)
Use Pantyhose (does nothing for freezer burn protection and can cause sever feather damage if they don't lay perfectly when applying....now if you enjoy just having women's ware in your blind bag then so be it
Vaccuum seal bags (Can and will leave those "dot" impressions on the feathers if sealed too tight. If done loosly it is fine )
What about blood on the feathers ? Either in the field or in the kitchen sink, use COLD water to lightly rinse off any blood you see. This is not a must but does lessen the taxidermist's work once they get it. Warm or hot water will set the blood stains to the feathers and could potentially ruin a mountable bird.
What about broken wings ? On flying poses broken wings aren't usually an issue unless the (wrist) bone is broken (the small bone connected to the primaries). If it is broken there is no way to support that area and it will potentially break in the future. Basicly it is like carrying around a potatoe chip forever and thinking it won't break. I will not take the chance of mounting something that WILL break in the future. Also, wing shot birds missing more than one main feather are not for flying poses.