Really appreciate all the in-depth knowledge on earthworms. Now I wonder what other species of birds in North America seek out earth worms. Also, of all the species of earth worms, I wonder which are most common to “lawns.”



While there are plenty of invasive earthworms in North America, primarily in the northeast and areas that have been relatively recently lost their glaciers, about 2/3rds of the earthworms in North America are natives and could have fed
American Robins before transatlantic shipping became common:

“Earthworms are shifting their ranges northwards into forests between 45° and 69°
latitude in North America that have lacked native earthworms since the last
ice age.^[4] The
worms in question are primary engineers of their environment. They are considered keystone
species because, as detritivores,
they alter many different variables of their ecosystem.^[4] Of
the 182 taxa of earthworms found in the United States and Canada, 60 (33%) are introduced species.^[5] “

From:
Invasive earthworms of North America - Wikipedia

_______________________________________________
Tweeters mailing list
Tweeters at u.washington.edu
http://mailman11.u.washington.edu/mailman/listinfo/tweeters