What a difference a day makes. These were shot yesterday morning, the day after those from my last post. There was about four inches of snow on the ground at the trailhead. Deeper the farther up the valley you go.
The bull in these shots is one that we call "Optimus Prime" or OP for short. He has been the dominant bull in the valley for several years. He is at least ten or twelve years old based on the fact that another guy I shoot with has photos of him for the past six years during his dominance. Bull moose fully mature to the point of being large/strong enough to become that alpha male at four to six years of age. This old boy is past his prime now. Up until the past two days OP had not been sighted yet this fall. He is visibly diminished relative to previous years in both body mass and the size of his antlers. We fear he'll likely not survive this rut or if he does won't make it through the winter.
All shot with D4/80-400G, handheld. Uploaded at low rez due to light box being down.
1) Here OP is posturing at me the same way that he would when facing a challenge from another bull. This is new behavior from him as historically he has always ignored people completely. The fact that he felt threatened enough by my presence to warn me off is suggestive of his feeling his age/infirmity. This is one time that still photography doesn't display the behavior well. When posturing like this the bull turns sideward towards the opponent, extends his legs to achieve maximum height, and walks stiff legged, swaying his antlers back and forth. The theory is that they are displaying their size/strength to scare the other animal away without the need for a fight. Note the ears back and whites showing around the eyes.
2) In this shot he is displaying flehmen behavior after smelling the scent of a cow. It is well known that the senses of smell and taste are linked and biologists/scientists theorize that when animals display this behavior they are using their taste buds as well as smell to analyze the scent of the female to determine if she is in estrus.
3) Here he is with the object of his desire. She is a fairly small cow and behaved rather tentatively so is likely young and probably her first breeding season. He must have decided she wasn't yet amorous because right after this he left and walked across the valley. Though she did follow him so perhaps they just wanted a bit of privacy.