Some good answers here!
I also used to sell insurance. I know I've posted this before, luckily I saved the text in case it needed to be reposted, see below. What you may need to do is consider livestock insurance. The company that provided this quote (back in the early 2000s) was Lloyds of London underwritten by Crowe Livestock Underwriting Limited, quoted through a brokerage I used to work for.
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I had always heard Lloyds of London was the only avenue available. I finally was able to get an example of costs, so I thought I would share!
For example… to insure a collection of ball pythons in the amount of $300,000 for Mortality and Theft coverage, with an annual aggregate deductible of $10,000, the yearly premium would be approximately $11,500. Of course lower deductibles increase the annual premium cost and higher deductibles lower it. A 1% deductible (in this example, that would be a $30,000 deductible) the yearly premium drops to approximately $5,000.
Again, please note, the example above is just that… an example. Lloyds evaluates each collection on a case by case basis. The application for the insurance is very thorough, asking for the type, age/hatch date, breeder, markings, etc. It also asks for detailed information about their security, caging and health. All of those factors as well as some additional considerations are what determine the actual price. I just thought it would be nice to provide an example of a quote. Obviously this is something made for people with large collections and in general is not cost effective for someone with only a few snakes.
I just thought this was interesting!
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edit to add - and be careful with your normal homeowners insruance, besides being excluded, if they find out you have 'dangerous/wild animals' they may drop your coverage all together.