Indigo Buntings - black ballpoint pen (Breeding Bird Atlas)
Pine Siskins - black wash (Breeding Bird Atlas)
Gulls at Niagara Falls - pen and ink (Bull's Birds of New York State)
Black-capped Chickadee - black wash (Breeding Bird Atlas)
Red Crossbill - black wash (Breeding Bird Atlas)
House Finch - black wash (Breeding Bird Atlas)
Evening Grosbeak - black ballpoint pen (Breeding Bird Atlas)
Rose-breasted Grosbeak - black ballpoint pen (Breeding Bird Atlas)
Blue Grosbeak (and Cowbird) - black wash (Breeding Bird Atlas)
Marsh Wren - black wash (Breeding Bird Atlas)
Ruby-crowned Kinglet - black wash (Breeding Bird Atlas)
Northern Cardinals - black wash (Breeding Bird Atlas)
Tufted Titmouse - black ballpoint pen (Breeding Bird Atlas)
Purple Finch - black ballpoint pen (Breeding Bird Atlas)