Study plan for waterfowl injury assessment: Determining PCB concentrations in Hudson river resident waterfowl" (PDF). New York State Department of Environmental Conservation. US Department of Commerce. December 2008. p.3. Archived (PDF) from the original on 2022-10-09 . Retrieved 2 July 2019. Penises have been a longstanding subject of scientific fascination, and they’re far more studied than vaginas. One explanation for this research gap, says Willingham, is “because of who has been asking the questions until quite recently, and who's been deciding how those questions should be answered.” The females are kept in a single large indoor pen and the drakes can him them - is that adding fuel to the hormonal fire! In the competitive groups, a few big males grew prodigious organs as if dominating the group. Other males grew more moderate penises, which started wasting away weeks earlier than those of dominant males or males with no competition. The others have the characteristic wide flat bill adapted to dredging-type jobs such as pulling up waterweed, pulling worms and small molluscs out of mud, searching for insect larvae, and bulk jobs such as dredging out, holding, turning head first, and swallowing a squirming frog. To avoid injury when digging into sediment it has no cere, but the nostrils come out through hard horn.

I stayed in cheap hotels, the kind of places where you can feel the slats of the bed beneath the mattress. But there was nothing substandard about the dining rooms. As the researchers expected, the lesser scaups housed in groups grew longer penises than those housed in pairs. The results were published Wednesday in the journal The Auk. Willingham explains that this violent process has caused bedbugs to evolve “something very vagina-like where they tend to get stabbed.” This special less-armored area of their abdomen might minimize harm as the male injects his sperm into the female’s circulatory system. Gender-Bending Genitals Hirsch, Adam (October 7, 2008). "Voting Round for the BOSS Mashable Challenge". Mashable . Retrieved March 19, 2013.Thorkelson, Berit (2005). You Know You're in Minnesota When...: 101 Quintessential Places, People, Events, Customs, Lingo, and Eats of the North Star State. (1st ed.). Guilford, Connecticut: Insiders' Guide. p. 18. ISBN 978-0-7627-3895-3. SS:The remaining drakes are in pairs of 2 and kept in 23 separate pens to prevent incessant, aggressive, injury- causing behavior. We still struggle with aggression between pairs and at times between pair mates. I randomly see one trying to mate his pen mate and I worry what the effects of this are if there is penetration?

Fitter, Julian; Fitter, Daniel; Hosking, David (2000). Wildlife of the Galápagos. Princeton, NJ: Princeton University Press. ISBN 978-0-691-10295-5. Shirihai, Hadoram (2008). A Complete Guide to Antarctic Wildlife. Princeton, NJ, US: Princeton University Press. ISBN 978-0-691-13666-0. The theory is based on our history of observation, experimental past set ups, and current arrangement. Garling, Caleb (June 24, 2013). "Huge traffic spike hits 'private' search engines after NSA leaks". San Francisco Chronicle. Archived from the original on October 29, 2013 . Retrieved July 10, 2013.Sometimes, penises pose logistical challenges. That is certainly the case for the leopard slug, which is so well-endowed that it has to go to extreme measures to reproduce. The blue whale might have the world’s biggest penis, but size is relative. Barnacles have the biggest penis-to-body size ratio, with genitalia nearly eight-times their total body length. Dolphins are known for their intelligence, promiscuity and absurdly dexterous penises. They have a prehensile penis, meaning it can swivel, grab and grope, much like a human hand. A prehensile penis helps males navigate the complex, labyrinth-like reproductive tracts of female dolphins. a b Gomme, Alice Bertha (1894), The Traditional Games of England, Scotland and Ireland, London: Nutt, pp.305–310

By shutting down half of their penis at a time, male echidnas fit perfectly with the female’s two-branched reproductive tract. This creature’s coat of quills don’t spare its genitalia, which features penile spines—a horrifying frequent trait in the animal kingdom (even humans once had them) which may increase fertilization success or trigger ovulation. Getting Handsy Sued-Badillo, Jalil (2003). Autochthonous Societies. General History of the Caribbean. Paris: UNESCO. ISBN 978-92-3-103832-7.

Do the twist

SS: We are a vegan agroecological, agroforestry farm on 1300 acres practicing rewilding agriculture and trying to demonstrate how to partner with traditional farm animals in a new context where they are not commoditized as part of the food chain. Rohwer, Frank C.; Anderson, Michael G. (1988). "Female-Biased Philopatry, Monogamy, and the Timing of Pair Formation in Migratory Waterfowl". Current Ornithology. pp.187–221. doi: 10.1007/978-1-4615-6787-5_4. ISBN 978-1-4615-6789-9. Sometimes one just isn’t enough. Or so it seems for the echidna, a spiny egg-laying mammal, which has evolved a four-headed penis. During copulation, echidna penises operate on a part-time schedule: half the penis temporarily shuts down while the other two heads are responsible for fertilization. But those extra two heads aren’t there just to show off. Next time the echidna mates, he’ll alternate which half he uses. You could also have them sing and do the dance motions of classic children’s songs, such as “I’m a Little Teapot,” “Row, Row, Row Your Boat,” or “If You’re Happy and You Know It, Clap Your Hands.”