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We're cautioned not to throw rice at the bride and groom, because the grain will prove harmful to the birds who swoop down to eat it. The rice expands in those little birdy stomachs, causing our avian companions to explode, we're warned. This rumor was so pervasive, that in 1985 a Connecticut state legislator introduced a bill (amusingly titled An Act Prohibiting the Use of Uncooked Rice at Nuptial Affairs) to outlaw the practice: However, local ornithologists said that they had never heard of or seen birds dying after consuming rice thrown at weddings: Advice columnist Ann Landers repeated this legend in informing to her readers not to throw rice at weddings, an act which drew rebukes from ornithologists: Ann printed a response from one New York ornithologist who took her to task for spreading misinformation: As noted in those responses to Ann Landers' spreading of this rumor, plenty of wild birds eat naturally growing, uncooked rice without suffering death or any other harmful effects. The notion that rice absorbs moisture, and would therefore swell up to many times its original size in the crop of a bird and thereby rupture avians from within, is a mistaken one based upon our culinary experiences with rice. We typically boil rice prior to eating it, and rice grains do absorb a fair amount of moisture during that process. But otherwise rice absorbs moisture only very slowly, and the interior of birds is not nearly as hot nor as moisture-suffused as a pot of boiling water — any uncooked rice eaten by birds is digested or excreted long before it can pick up enough water to expand in size to the point of causing injury to them. Still, nothing satisfies curious minds like empirical evidence, so in 2002 University of Kentucky biology professor James Krupa put the matter to test with his students, conducting experiments that he eventually published in the April 2005 edition of the journal American Biology Teacher under the title A CLASSROOM EXERCISE FOR TESTING URBAN MYTH: Does Wedding Rice Cause Birds to Explode or Were Ann Landers, Martha Stewart & Bart Simpson Wrong? One factor Krupa and his students measured just how much rice actually expands when soaked in water. They found that soaked white rice expanded in volume by 33%, which might sound like a lot, but not so much when compared to ordinary bird seed, which they found increased in size by an even greater percentage (40%). If a 33% increase in volume of ingested rice could cause birds to explode, then bird seed should be turning even more of them into avian bombs. Krupa's group found that instant rice, both the brown and white varieties, expanded considerably more (2.4 to 2.7 times its original volume) than plain white rice when soaked. Instant rice isn't typically the sort that people throw at weddings (because it's costlier and more difficult to buy in bulk), but nonetheless the experimenters tested the possibilities by constructing models of bird crops from thin plastic and wet paper and filling them with instant rice. Although a paper bag filled with soaked instant white rice ruptured in about 15 minutes, none of the avian crop models burst. Krupa's students prevailed upon him to also test the exploding rice theory on real birds, an entreaty he finally acquiesced to because he felt their previous experiments had sufficiently demonstrated that no birds would come to harm through the process. He agreed to try some rice-feeding tests with flocks of doves and pigeons he kept at home, feeding 60 of his birds a diet of nothing other than instant rice and water for one day and monitoring them for any ill effects. He found that none of the birds showed any obvious signs of pain, discomfort, or distress; none of them exhibited ruptures or other injuries (including explosion), and none of them took ill or died. Many churches and reception halls still have rules prohibiting the throwing of rice, or require that thrown rice be enclosed in those little tulle and chiffon bags. This practice isn't about protecting birds, however: these rules work to keep the properties clean so that subsequent happy couples don't get their send-offs amid the leavings of a previous pair. Rice and confetti can be notoriously hard to clean up, and sometimes not even vacuuming a lawn will return the grass to its pristine condition. Rice also poses a unique danger, albeit it to people rather than birds: rice scattered on a hard surface (such as the steps of a church or a dance floor) puts anyone who walks across that surface at risk of taking a nasty spill. Far better to prohibit rice throwing at a wedding than to end up with an injured guest. Don't do it for the birds, do it for the inlaws. Sightings: In The Simpsons episode of 14 May 2000, Bart is warned not to throw rice at Otto's wedding, lest he cause birds to explode. Also, in the 16 July 2001 episode of the TV soap opera Passions Charity told Tabitha that they don't throw rice at weddings anymore, stating this legend's premise as the reason. And in an episode of the TV sitcom Cybill (Bachelor Party, original air date 6 January 1997), Holly (Ira's fiancée) dictates that rice won't be thrown at her wedding because it makes pigeons explode.
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