Table 1. Summary of variables requested in the 2018, 2019 and 2020 surveys that were used to investigate the factors affecting a householder’s decision to create a hedgehog highway.

Name	Description	Levels
HIGHWAY	Dependent variable; a binary measure of whether the respondent had made a hedgehog highway or not	(0) No
		(1) Yes
RESIDENTS	Number of residents occupying the address at the time of the survey	Continuous
YEARSRESIDED	The length of time that the address had been occupied by the respondent	(1) 0–5 years
		(2) 6–20 years
		(3) >21 years
REGION	The region of the UK where the respondent lived	(1) East
		(2) Southeast
		(3) Southwest
		(4) Northwest
		(5) London
		(6) East Midlands
		(7) Northeast
		(8) Yorkshire and the Humber
		(9) West Midlands
		(10) Wales
		(11) Scotland
		(12) Northern Ireland
SETTING	Type of location where house is situated	(0) In a village or smaller
		(1) In a town or city
HOUSETYPE	Type of house	(1) Detached
		(2) Semi-detached
		(3) Terraced
		(4) Flat
GARDENTYPE	Extent / type of gardens associated with property	(1) One private front garden OR one private back garden OR communal garden
		(2) Both a private front AND back garden
GARDENFEATURES	Extent of wildlife-friendly features present within respondent’s garden, selected from multiple-choice options (flowering lawn; wildflowers; wild patch; hedgerow; log pile; pond; bird box; bat box; hedgehog house; insect hotel; compost heap; water for wildlife)	(0) Six or less features
		(1) Seven or more features
BADGERFOX	Whether the respondent had sighted a badger or fox in their garden in 12 months prior to the survey [NB badger and fox sightings were merged due to the low number of positive sightings]	(0) Not sighted in last 12 months
		(1) Sighted in last 12 months
HEDGEHOG	Whether the respondent had sighted a hedgehog in their garden in 12 months prior to the survey	(0) Not sighted in last 12 months
		(1) Sighted in last 12 months
RODENT	Whether the respondent had sighted a rodent in their garden in 12 months prior to the survey	(0) Not sighted in last 12 months
		(1) Sighted in last 12 months
HEDGEHOGSTREET	Whether the respondent had heard of Hedgehog Street prior to the survey	(0) Not aware
		(1) Aware
FEEDHEDGEHOG	Whether the respondent ever leaves food out for hedgehogs in their garden	(0) Does not leave food out
		(1) Leaves food out
ENVIGROUPS	Whether the respondent was a member of any environmental or wildlife groups	(0) Not a member
		(1) Is a member
EMPLOYMENT	Respondent’s level of employment	(1) Part-time
		(2) Full-time
		(3) Unemployed or homemaker
		(4) Student
		(5) Retired
		(6) Prefer not to say / other
WATCHWILDLIFE	A ranking of how important the respondent considered garden wildlife-watching activities to be (averaged from the variables ‘watching birds’ and ‘watching other wildlife’)	(0) Less important or not important
		(1) Important or very important
GARDENING	A ranking of how important the respondent considered gardening to be (averaged from the variables ‘gardening’ and ‘growing food’)	(0) Less important or not important
		(1) Important or very important
RECREATION	A ranking of how important the respondent considered recreational uses of the garden to be (averaged from the variables ‘socialising’, ‘relaxing’, ‘use by pets’, ‘use by children’, ‘laundry’ and ‘storage’)	(0) Less important or not important
		(1) Important or very important