Dog owners were warned to be vigilant after deadly animal traps were found on Yorkshire Water land.
Several steel-wired snares had been attached to trees and fences on green nylon lines. They were left at knee to waist height.
A spokesman for Ogden Water Nature Reserve said: "With the snares being around knee height and higher it would appear that the person setting them were after deer.
"Unfortunately these are at the same height that could snare a dog as they head out in the woodlands.
"These were found by a member of the public and handed in at the visitor centre and to staff on site."
The snares were found on deer tracks which are off the main paths.
Dog owners who like to get off the beaten track were urged to be vigilant.
West Yorkshire Police were informed and checks were carried out by officers and wardens.
Type of snare
Ogden Water, near Halifax