Possible tracks and vocalizations outside Lumby witnessed in British Columbia, Canada

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It was around Dec 1, 05. I will get the exact day from my girlfriend later. We had just purchased a 77 acres which had 40 acres hay, the rest cedar trees and swampy areas, with a creek. Anyways, it came with 11 wrecked cars left in the bush for over 20 30 years. I called a tow truck driver to see if we could get them off the property. we arranged to meet there early saturday morning. 7am, we were late so 8 was around the meeting time up there. I met up with the tow truck driver, and proceeded to show them where the cars and trucks were. While talking, i started hearing an unfamiliar sound coming from down the valley , maybe a km away, which was pretty loud cause we were standing next to a running diesel truck which was noisy itself. Anyways I was first to mention it, I'm kinda in tune to sounds or movements in the bush, cause I'm an avid hunter. I asked them what the hell is that .. it was loud, non stop screaming, echoeing in the valley getting closer. So the tow truck guy shut off th...