Starting to get crowded in there…but room for one more 
Great work!
Back in July last year @Maybe_It_s_a_Trap was suggesting collating research articles. I have been looking for any research done comparing artificial eggs with real eggs. There seems to be plenty of anecdotal comment that mustelids are visual hunters and that artificial eggs (even golf balls) are as good a bait as real eggs. However I cannot find any hard evidence as in a published article. Wondering if anyone has a link to anything along these lines? Cheers Pat