You can take a short cut and google a caresheet from others studies when researching a species to add to your collection or you can go back to basics and do the groundwork yourself. When I first got into the hobby there wasn't the Internet as we know it now with countless forums and websites to help us to learn how best to keep our serpent friends in captivity. There wasn't any specialist books such as 'The Monograph' by Schulz to refer to when a new species was imported.

The maps and charts within these pages are one of the ways that has helped me to understand the requirements of some of the lesser known species. I'm not saying that its 100% accurate but it's a good starting point researching. Most of the maps you can see at a glance the data that your after without reading pages of text to find it. The chart below lists most of the Asian species of Ratsnakes and I've colour coded them to help you locate the data on the maps. The Climate maps are from the Koppen climate classification. It is based on the concept that native vegetation is the best expression of climate; thus, climate zone boundaries have been selected with vegetation distribution in mind. It combines average annual and monthly temperatures and precipitation, and the seasonality of precipitation.

ASIATIC RATSNAKE CLIMATE ZONES
Genus / sp. / spp.	Biome	Main Activity	Climate	Life Style	Altitude	Native to
Coelognathus
erythrurus erythrurus		Crepuscular		Terrestrial	> 1065m	Philippine Islands of Pacijian, Ponson, Poro, Basilan, Siasi, Bohol, Camiguin, Dinagat, Leyte, Mindanao and Samur
erythrurus celebensus		Crepuscular		Terrestrial	> 850m	Indonesian Islands of Celebes and Buton
erythrurus manillensus		Crepuscular		Terrestrial	> 850m	The Philippine Islans of Luzon, Mindoro and Polillo
erythrurus philippina		Crepuscular		Terrestrial	> 850m	The Philippine Islands of Balabac, Bongao, Sanga, Sibutu, Tawitawi, Busuanga, Culion and Palawan
erythrurus psephenourus		Crepuscular		Terrestrial	> 850m	The Philippine Islands of Cebu, Guimaras, Masbate, Negros and Panay
flavolineatus		Crepuscular		Terrestrial	< 900m	Brunei, Burma, India, Indonesia, Malaysia, Thailand & Vietnam
helena helena		Crepuscular		Terrestrial	< 900m	Bangladesh, India, Nepal, Pakistan & Sri Lanka
helena helena ' West India'		Crepuscular		Terrestrial	< 900m
helena helena 'North Sri Lanka'		Crepuscular		Terrestrial	< 900m
helena helena ' Central Sri Lanka'		Crepuscular		Terrestrial	< 900m
helena helena 'South Sri Lanka'		Crepuscular		Terrestrial	< 900m
helena monticollarus		Crepuscular		Terrestrial	700 & 1900m	Western Ghats
radiatus		Crepuscular		Terrestrial	< 1500m	Bangladesh, Burma (Myanmar), Cambodia, China, India, Indonesia, Laos, Malaysia, Nepal, Thailand, Vietnam
radiatus 'Thailand'		Crepuscular		Terrestrial	< 1500m
radiatus 'Java, Sumatra, Borneo'		Crepuscular		Terrestrial	< 1500m
radiatus 'Burma'		Crepuscular		Terrestrial	< 1500m
subradiatus subradiatus				Terrestrial	<1200m	Indonesian Islands & The Lesser Sunda Islands
subradiatus enganensis				Terrestrial		Boea Boea, Engano Island
Elaphe
anomala		Diurnal		Semi-Arboreal	< 2000m	China, Korea.
bimaculata		Diurnal		Terrestrial	50 - 1000m	China
bella bella					1500 - 2000m	Kachin, North Burma/Myanmar.
bella chapaensis					1500 - 2000m	China & Central Hong Valley in far north Vietnam
carinata		Diurnal & Nocturnal		Terrestrial	< 3200m	China
carinata yongaguniensis				Terrestrial	< 230m	Yongagunijima in the Ryukyus and Taiwan along with the Taiwanese Islands of Lanyu and Pescadore.
carinata deqenensus				Terrestrial	2500 - 3200m	Northern Yunnan Province, China
climacophora		Crepuscular		Semi-Arboral		Japan and neighbouring islands
climacophora 'Kunashir'		Crepuscular		Semi-Arboral	< 2000m	Kunashiri
davidi					100 - 1000m	China and North Korea
dione		Diurnal		Terrestrial	< 3500	Ukraine, Afghanistan, Turkmenistan, Russia, Georgia, Mongolia, North Korea, South Korea, Armenia, China, Azerbajan, Uzbekistan, Tadzhikistan, Kyrgyzstan
dione 'Korea'		Diurnal		Terrestrial	< 3500
dione 'Russia'		Diurnal		Terrestrial	< 3500
quadrivigata		Diurnal		Terrestrial	< 2000m	Japan Islands and adjacent Kunashir Is.
quadrivigata ' N.Japan'		Diurnal		Terrestrial	< 2000m
quadrivigata 'N. Hokkaido'		Diurnal		Terrestrial	< 2000m
schrencki		Diurnal		Semi-Arboreal	< 2000m	China, Korea, Russia, Mongolia.
Euprepiophis
mandarinus		Crepuscular		Fossorial	< 3000m	Burma (Myanmar), China, India, Taiwan, Vietnam
mandarinus 'North Vietnam'		Crepuscular		Fossorial	< 3000m
conspicillatus		Crepuscular		Fossorial	100 - 3000m.	Japan and neighbouring islands, Kunashiri Island
conspicillatus 'japonica'		Crepuscular		Fossorial	100 - 3000m.
perlaceus				Fossorial ?	2000 - 2500m	China
Gonyosoma
frenatum				Arboreal	550 - 2000m.	China, India, Northern Thailand & discovered and recorded in Taiwan from the following locations Li-long Mt., Jingfong District, Dahan Mt.,Taiyuan, Beinan District, Chochi District (Mao et al. 2002)
frenatum 'North Vietnam'				Arboreal	550 - 2000m.
janseni		Diurnal		Arboreal		Indonesian island of Sulawesi/Celebes & Salayar
oxycephalum		Diurnal		Arboreal	< 750m	India, Burma, Vietnam, Cambodia, Philippines, Malaysia, Thailand & Indonesia.
oxycephalum ' South Thailand'		Diurnal		Arboreal	< 750m
oxycephalum 'Thailand & South Vietnam'		Diurnal		Arboreal	< 750m
prasinum		Diurnal		Arboreal	900 - 2560m.	India, China, Burma (Myanmar), Malaysia, Thailand, Vietnam
Orthriophis
cantoris					1000 - 2300m	Burma & India
hodgsoni					1000 - 3200m	China, India, Nepal
moellendorffi		Matutinal		Terrestrial	50 - 300m	China, Vietnam
taeniurus taeniurus		Diurnal & Nocturnal		Semi-Arboreal	< 1000m	China
taeniurus friesi		Diurnal & Nocturnal		Semi-Arboreal	< 1000m	Taiwan
taeniurus grabowskyi		Diurnal & Nocturnal		Semi-Arboreal	200 - 2100m	Malaysia
taeniurus mocquardi				Semi-Arboreal	< 1000m	China, Vietnam.
taeniurus ridleyi		Diurnal & Nocturnal		Semi-Arboreal	200 - 1500m	Malaysia
taeniurus schmackeri		Diurnal & Nocturnal		Semi-Arboreal
taeniurus callicyanous.		Diurnal & Nocturnal		Semi-Arboreal	600 - 1000m	Vietnam, Burma (Myanmar), Thailand
taeniurus yunnanensis		Diurnal & Nocturnal		Semi-Arboreal	700 - 3100m	Burma (Myanmar), China, India, Laos, Thailand, Vietnam
Oreocryptophis
porphyraceus porphyraceus		Crepuscular		Terrestrial	1000 - 2600m.	India, Burma, China & Thailand
porphyraceus coxi		Crepuscular		Terrestrial	800 - 1000m	Thailand
porphyraceus hainanus				Terrestrial	100 - 1500m	China
porphyraceus kawakammii		Crepuscular		Terrestrial	400 - 1500m	Endemic to the Island of Taiwan
porphyraceus laticinctus		Crepuscular		Terrestrial	1000 - 2600m	Malaysia, Cameron Highlands
porphyraceus pulchra		Crepuscular		Terrestrial	1000 - 2600m	China
porphyraceus vaillanti		Crepuscular		Terrestrial	200 - 500m	China