The return of blue rabbit urine
Mar. 7th, 2014 07:13 pm
When eastern cottontails browse on the twigs of the alien invasive shrub buckthorn, certain chemicals enter their urine. The urine of rabbits is dilute brown to orange, even when tainted by buckthorn. But if that buckthorned urine is then acted on by sunlight, the color changes to blue. If that urine is suspended in the snow, then we get to enjoy this bizarre phenomenon.
Blue Rabbit Urine and kids with guns
Jan. 5th, 2010 07:54 pmI got an email today from the New York State Department of Environmental Conservation. I had to google the acronym to figure out who they were, and their terse message indicated they wanted one of my photos. No offer to pay, just a request for permission and a for a higher-resolution image. They were asking about my blue rabbit urine photo. I'm not going to explain, you have to click that link and read it.
While googling NYSDEC I discovered an album full of photos of child hunters. By which I mean human children who hunt, as a hobby, not people or monsters that hunt children. There's something haunting about a picture of an eleven year old boy hoisting up a 42 pound coyote he's killed. Actually, probably an adult guardian killed the coyote, since I'm inferring that the age for firearms use in NY State is 14 (based on the deer hunter photos). (If I understand trapping correctly, the trapper sets a line of traps in the afternoon/evening, then checks them the next morning; animals are held in place but not killed by the traps, and the trapper shoots the trapped animal.)
And speaking of legally owning firearms, I got my FID card today. It's amusing to me that I got my driver's license just as I turned 30 and now I've gotten my first gun license as I've turned 40. For now, the card simply allows me to transport firearms as needed for work. I can see learning to use a shotgun and/or a rifle at some point (some point after we've moved from Massachusetts), as I think these are useful skills and useful tools. For the record, I am in favor of hunting for food, but I think it's absurd when people call it a "sport." Not that it doesn't take considerable skill, but it seems disrespectful to the animal to put it in those terms. Killing the animal by wrestling it to death, that would be a sport.
If I can find a higher-res image of my blue rabbit urine photo, they are welcome to publish it.
While googling NYSDEC I discovered an album full of photos of child hunters. By which I mean human children who hunt, as a hobby, not people or monsters that hunt children. There's something haunting about a picture of an eleven year old boy hoisting up a 42 pound coyote he's killed. Actually, probably an adult guardian killed the coyote, since I'm inferring that the age for firearms use in NY State is 14 (based on the deer hunter photos). (If I understand trapping correctly, the trapper sets a line of traps in the afternoon/evening, then checks them the next morning; animals are held in place but not killed by the traps, and the trapper shoots the trapped animal.)
And speaking of legally owning firearms, I got my FID card today. It's amusing to me that I got my driver's license just as I turned 30 and now I've gotten my first gun license as I've turned 40. For now, the card simply allows me to transport firearms as needed for work. I can see learning to use a shotgun and/or a rifle at some point (some point after we've moved from Massachusetts), as I think these are useful skills and useful tools. For the record, I am in favor of hunting for food, but I think it's absurd when people call it a "sport." Not that it doesn't take considerable skill, but it seems disrespectful to the animal to put it in those terms. Killing the animal by wrestling it to death, that would be a sport.
If I can find a higher-res image of my blue rabbit urine photo, they are welcome to publish it.
Blue Rabbit Urine
Feb. 21st, 2007 05:17 pmAt my work, there is a recurring report from people tracking animals in the snow; a bizarre and lurid claim of blue rabbit urine. After six winters there, I have finally witnessed this first hand. Before seeing the blue stain on the snow myself, I was frankly skeptical, and assumed that people were seeing something else, and mistaking it for blue rabbit urine.
A quick search turns up one article on the phenomenon--posted by an "urban field ecologist," no less--from the previous winter. You can read it here: http://nuthatch.typepad.com/ba/2005/12/blue_smurf_pee_.html Another reference to this, with anecdotal experimental information is here: http://www.ont-woodlot-assoc.org/sw_nonfibre_redskies.html
The gist of it, is this: Our native rabbits (the eastern cottontail) have been browsing on an alien shrub (European buckthorn). The buckthorn contains a chemical that passes out with the urine, which comes out yellowish to brownish, but after exposure to sunlight, turns a lovely blue color. This effect is visible, of course, because the urine in question is suspended in snow. You would think that the cottontails are eating the berries of the buckthorn, because they are purplish, but according to the second reference above, the effect occurs after the rabbits eat other parts of the plant. Buckthorn holds its leaves long after most native deciduous plants, and in winter cottontails subsist largely on bark and twigs. The second reference also emphasizes that buckthorn is not a favored browse plant of North American herbivores, and that they have to be driven to feed on it out of desperation. I'm not sure about that; my workplace has enough Norway maple saplings to sustain a cottontail factory farm.
So, without further ado (okay, one doo) here is some blue rabbit urine:

A quick search turns up one article on the phenomenon--posted by an "urban field ecologist," no less--from the previous winter. You can read it here: http://nuthatch.typepad.com/ba/2005/12/blue_smurf_pee_.html Another reference to this, with anecdotal experimental information is here: http://www.ont-woodlot-assoc.org/sw_nonfibre_redskies.html
The gist of it, is this: Our native rabbits (the eastern cottontail) have been browsing on an alien shrub (European buckthorn). The buckthorn contains a chemical that passes out with the urine, which comes out yellowish to brownish, but after exposure to sunlight, turns a lovely blue color. This effect is visible, of course, because the urine in question is suspended in snow. You would think that the cottontails are eating the berries of the buckthorn, because they are purplish, but according to the second reference above, the effect occurs after the rabbits eat other parts of the plant. Buckthorn holds its leaves long after most native deciduous plants, and in winter cottontails subsist largely on bark and twigs. The second reference also emphasizes that buckthorn is not a favored browse plant of North American herbivores, and that they have to be driven to feed on it out of desperation. I'm not sure about that; my workplace has enough Norway maple saplings to sustain a cottontail factory farm.
So, without further ado (okay, one doo) here is some blue rabbit urine:
