Did it sit in one place long enough for you to really study all of its colors and other characteristics? The avid birders among us sometimes search their whole life for a glimpse of a particularly rare species. Beyond fieldwork, though, access to rare or extinct species or those with a limited range can be especially difficult to get. Access to rare specimens, such as those of extinct birds, can be especially difficult to get. This reveals details in color and feather structure beyond what can be seen with the naked eye.