Range Coding

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Range Coding

8-digit Hydrologic units were used to delineate species ranges. PDF images are found below to provide context in reviewing these species.

HUCS with Counties
HUCS with major streams and lakes
HUCS with major roads
HUCS with elevation

Map and Analysis Range Coding

Map Number	Code	Description
17	k12	Known or probable occurrence, breeding, wintering
18	k13	Known or probable occurrence, breeding, summering
19	k14	Known or probable occurrence, breeding, winter and summering
21	k21	Known or probable occurrence, non-breeding, migratory
22	k22	Known or probable occurrence, non-breeding, wintering
23	k23	Known or probable occurrence, non-breeding, summering
24	k24	Known or probable occurrence, non-breeding, winter and summer
29	k34	Known or probable occurrence, breeding and non-breeding, winter and summer
38	p13	Potential occurrence, breeding, summering
41	p21	Potential occurrence, non-breeding, migratory
42	p22	Potential occurrence, non-breeding, wintering
49	p34	Potential occurrence, breeding and non-breeding, winter and summer
61	x21	Extirpated, non-breeding, migratory
62	x22	Extirpated, non-breeding, wintering
69	x34	Extirpated, breeding and non-breeding, winter and summer

Each HUC was coded with a 3-digit code (below).

Character in Code	Biological Relation	Code and Definition
First Character	Historic/Recent Distribution	K = Known (includes repatriated)
		P = Potential
		X = Extirpated
Second Character	Reproductive Use	0 = none
		1 = breeding
		2 = nonbreeding
		3 = both
Third character	Seasonal Use	0 = none
		1 = Migratory (Spring and/or Fall)
		2 = Wintering
		3 = Summering
		4 = Winter and Summer

K34+ = Originally coded as K00.
K34* = Originally coded as P00. This data was obtained from either CO-GAP, NM-GAP, or species occurrence data from NatureServe.

Example: K13 = for a species that is known in the watershed, breeds and summers in the watershed.

Historical/ Recent Distribution
	Label	Description
	Known	Species is known to or probable to occur within the watershed. Species may have been repatriated recently in a portion of their historical range.
	Potential	No known locations, but species could be within the watershed based on proximity and habitat characteristics.
	Extirpated	Species with historical occurrence that have been chosen to be modeled.
Reproductive Use
	Breeding*	Species is known to breed within the watershed.
	Non-Breeding*	Species is known to occur within the watershed.
	Both*	Species is known to occur within the watershed throughout the year.
Seasonal Use
	Migratory	Species is known to occur within the watershed during its regular migration in Spring and/or Fall.
	Wintering	Species in known to winter within the watershed.
	Summering	Species in known to summer within the watershed.
	Winter and Summer	Species uses watershed during summer and winter

*Breeding and nonbreeding habitat may apply to bird species, bats, and some other mammal species.

For additional comments or questions contact
Ken Boykin
505.646.6303