"cover for EVOLUTION OF CULTURE IN ANIMALS" - 16-5/8" x 11-1/4" - pen and ink
"chimpanzees feeding on termites" - 6-1/8" x 4-3/4" - pen and ink
"oxpecker" - 7" x 10" - graphite
"cover for BIRD OBSERVER for Eastern MA" - 8-1/8" x 12-1/8" - pen and ink
"blue tit opening milk bottle" - 6-1/2" x 3-1/2" - pen and ink
"herons" - 7" x 10" - graphite
"osprey" - 6-1/4" x 3-1/4" - pen and ink
"white throated sparrow" - 6-1/2" x 9-3/4" - pen and ink
"wolves" - 7-5/8" x 9-1/8" - ink and pen
"blue jay" - 7-1/2" x 6" - pen and ink
"snowy owl - title page" - 7" x 8" - pen and ink
"marsh wrens" - 7-3/4" x 11-3/8" - pen and ink
"Watch Hill" - 7-3/4" x 11-3/8" - pen and ink
"harlequin ducks" - 7-3/4" x 11-3/8" - pen and ink
