Hello,
Glad to be on Ancestry. I'm wondering how accurate are some of the very long lineage's. On a few lines of my family, there is information (little green leaf pops up) from other ancestry trees going all the way back to 1000 a.d. in Wales. Once I started these long lines, each generation leads to another one very quickly. I guess people have done a lot of leg work?

Thanks,
Demian

Do not believe those lovely, long lineage lines unless you have done the research yourself. This is just the reason there are so many so-called trees out there with absolutely unbelievable data reaching back to royalty and sometimes all the way back to Adam and Eve. Unless you can prove your ancestry back that far, please do not merge or attach those trees to anything of yours. Those trees were more than likely created just that way, by attaching or merging another's tree, and another's, and another's, etc, etc. If you are new to genealogy, be wary and be smart. You will be glad you did. It takes years of research along with as much documentation as you can find and then you will probably never reach the end of the road.