The phrase "are known to range" is correct and usable in written English.
It can be used when discussing the known variability or distribution of a subject, such as species, behaviors, or characteristics.
Example: "These birds are known to range across various climates, adapting to different environments."
Alternatives: "are recognized to vary" or "are understood to extend".
The leatherback turtle Dermochelys and some other sea turtles are known to range close to the poles; no fossil turtles have been found in these regions, but few people have looked (we don't really expect to find them either; the living sea turtles are a more recent group).
Normally, North Atlantic sharks only stray as far south as South Carolina and the Gulf of Guinea, but pregnant females from the western North Atlantic population are known to range into the Sargasso Sea, almost as far as Hispaniola, to give birth.
Condors are known to range widely, even within a day [3], so the ideal analysis would take into account the bird's location at several times during each day.
The size of the pores in the mesh-like network are known to range in between 5 to 40 µm [ 40, 41].
Although killer whales are known to range over thousands of kilometres [ 6, 7], to date there is little direct evidence of seasonal or regular long-distance migrations anywhere, including Antarctica [ 8].
On CHROMagar Candida, S. cerevisiae colonies are known to range in hue from white to lavender to deep purple with most exhibiting the "purple" phenotype (C. L. Ludlow and A. M. Dudley, unpublished data; Boekhout and Robert 2003).
The Albedo was west of the Maldives, closer to India than to Somalia, but Somali pirates were known to range broadly.
A small habitat for a polar bear, said Dr. Ian Sterling of the Canadian Wildlife Service, where they know about such things, would be 20,000 or 30,000 square meters, and bears have been known to range over as many as 300,000 square meters.
Hysterectomy with concomitant cervical intraepithelial neoplasia (CIN), is often considered a definitive treatment for CIN, but development of subsequent vaginal intraepithelial neoplasia (VAIN) is known to range from 0.9%to6.8%8%.
The distribution of O. rufipogon is known to range from Asia to Australia beyond the biogeographical boundary known as the Wallace line (Wallace 1880, Vaughan 1994).
The monophyletic group Thylacocephala is known to range from at least 435 million years ago (Silurian) [ 1],[ 2] to 84 million years ago (Cretaceous) [ 3].
