She lived in Branford, Connecticut.
http://images.google.com/images?svnum=10&um=1&hl=en&q=%22jean+day+zall...er%22&b
(covers)
http://www.lib.uconn.edu/online/research/speclib/ASC/findaids/Zallinge...SS19970
(includes partial booklist)
"Jean Day Zallinger was born in February 1918, in Boston, Mass. She
attended the Massachusetts College of Art and received a B.F.A. from
the Yale School of Fine Arts in 1942. Mrs. Zallinger has illustrated
numerous (at least 75) children's books, mainly non-fictional works
about animals and plants, including such titles as Biography of a
Leaf, Discovering What Earthworms Do, The Earliest Americans, and Sea
Creatures Do Amazing Things."
Also:
Oliver Twist
Peter Pan
Weeds (Golden Guide)
They Turned to Stone, 1965
Valley of the Smallest; The Life Story of a Shrew, 1966
Digger Wasp, The, 1969
Rough list:
http://www.amazon.com/s/ref=nb_ss_gw/105-8402517-3723655?url=search-al...%3Dstri
Lenona.