Alfred Viola is Professor Emeritus of Chemistry at Northeastern University, Boston, where he taught for 41 years. His interests in nature photography began in the 1950's during vacations in the American West. He has now photographed birds and mammals on all seven continents. His photos, together with those of his wife, Joy, have been willed to the Center for Invasive Species and Ecosystem Health. Now an octogenarian, his most recent images have been the birds of Costa Rica, Florida and Arizona as well as the polar bears of Cape Churchill, Canada.

2,659 Images of 765 Subjects

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2659 Images

Image	Subject Name	Scientific Name	Description
1588137	saltwater crocodile	Crocodylus porosus
1589084	giraffe	Giraffa camelopardalis	Red oxpeckers feeding on neck of giraffe
1586044	Bengal tiger	Panthera tigris tigris	tiger track over car track
1586089	Indian python	Python molurus	head study
1586077	Indian rhinoceros	Rhinoceros unicornis	head shot
5430240	ostrich	Struthio camelus australis	with giraffe
5430241	ostrich	Struthio camelus australis	with giraffe
5430242	ostrich	Struthio camelus australis
1589475	ostrich	Struthio camelus australis	Flock at rest
1589476	ostrich	Struthio camelus australis	Males and females at rest
1589477	ostrich	Struthio camelus australis
1589478	ostrich	Struthio camelus australis	All males
1589479	ostrich	Struthio camelus australis	3 females
1589354	kori bustard	Ardeotis kori	Track
5469069	american bushtit	Psaltriparus minimus
5468957	Mexican jay	Aphelocoma ultramarina
5468999	house finch	Carpodacus mexicanus
5469028	Acorn Woodpecker	Melanerpes formicivorus
5469029	Acorn Woodpecker	Melanerpes formicivorus
5469038	gila woodpecker	Melanerpes uropygialis
5469039	gila woodpecker	Melanerpes uropygialis
5469040	gila woodpecker	Melanerpes uropygialis
5469042	gila woodpecker	Melanerpes uropygialis
5469043	gila woodpecker	Melanerpes uropygialis
5469044	gila woodpecker	Melanerpes uropygialis
5469133	white-crowned sparrow	Zonotrichia leucophrys	first winter plumage
5469134	white-crowned sparrow	Zonotrichia leucophrys	first year winter plumage
5469135	white-crowned sparrow	Zonotrichia leucophrys
5469136	white-crowned sparrow	Zonotrichia leucophrys
5469137	white-crowned sparrow	Zonotrichia leucophrys
5469076	chipping sparrow	Spizella passerina
5469078	chipping sparrow	Spizella passerina
5469079	chipping sparrow	Spizella passerina
5469138	white-crowned sparrow	Zonotrichia leucophrys
5469139	white-crowned sparrow	Zonotrichia leucophrys
5469140	white-crowned sparrow	Zonotrichia leucophrys	with a broken foot
5468964	anna's hummingbird	Calypte anna
5468968	anna's hummingbird	Calypte anna
5468969	anna's hummingbird	Calypte anna
5468981	pine siskin	Carduelis pinus	At suet feeder
5468982	pine siskin	Carduelis pinus	at suet feeder
5468987	lesser goldfinch	Carduelis psaltria	males and females on feeder
5468989	lesser goldfinch	Carduelis psaltria	males and females on feeder
5469050	harris's hawk	Parabuteo unicinctus	in flight
5469051	harris's hawk	Parabuteo unicinctus	perched
5469054	harris's hawk	Parabuteo unicinctus	landing
5469055	harris's hawk	Parabuteo unicinctus	perched
5469073	white-breasted nuthatch	Sitta carolinensis
5469072	white-breasted nuthatch	Sitta carolinensis
1588720	kea	Nestor notabilis	biting car's rubber insulation
1588700	Great Egret	Ardea alba
1588090	common ringtail	Pseudocheirus peregrinus
1588091	common ringtail	Pseudocheirus peregrinus
1588268	paved roads and streets		fern trees in the Black Spur Morunda Highway
1586675	light-mantled albatross	Phoebetria palpebrata
1588038	red kangaroo	Macropus rufus
1588106	mountain brushtail possum	Trichosurus cunninghami
1588107	mountain brushtail possum	Trichosurus cunninghami
1588108	mountain brushtail possum	Trichosurus cunninghami
1588312	darter	Anhinga melanogaster	on nest