These crawls are part of an effort to archive pages as they are created and archive the pages that they refer to. That way, as the pages that are referenced are changed or taken from the web, a link to the version that was live when the page was written will be preserved.Then the Internet Archive hopes that references to these archived pages will be put in place of a link that would be otherwise be broken, or a companion link to allow people to see what was originally intended by a page's authors.The goal is to fix all broken links on the web . Crawls of supported "No More 404" sites. ||||| NEW YORK (AP) — Some flights at New York's Kennedy Airport were briefly delayed, but not by passengers of equipment malfunctions. It was turtles. 
 
 The Port Authority of New York and New Jersey says about 40 diamondback terrapins crawled out of Jamaica Bay and onto the airfield at about 4:45 p.m. Friday. 
 
 Authority spokeswoman Cheryl Albiez tells the Daily News that some planes "were briefly stuck in queue" while the turtles were being rounded up. 
 
 The turtles' annual migration takes place from June to mid-July. 
 
 Port Authority wildlife specialists collect the animals that wander too close to the runway and release them to safer areas. ||||| Airline passengers flying from and to JFK Airport faced some delays when dozens of turtles decided to leave Jamaica Bay and take to the runways. Why? To lay eggs on the other side. 
 
 On Friday afternoon, flights had to wait for the diamondback terrapins to do their thing. One person Tweeted, "Im taxiing in my plane because there are turtles on the runway. Perhaps the only excuse I have ever found endearing," while another described, "My @AmericanAir flight into JFK is apparently delayed due to dozens of turtles crawling out of the bay onto the airfield." 
 
 Apparently there are TURTLES on the runway at JFK causing our delay to deplane 😂🐢 — sarah mcc (@unsarah) July 7, 2017 
 
 My flight has been delayed on JFK because of turtle crossing. I guess Ninja Turtles have arrived in New York — Mostafa Salah (@Mooose22) July 8, 2017 
 
 A Port Authority spokesperson told the Daily News, "There were planes briefly stuck in queue,. It is turtle season here, but it was a little unusual to get the turtles at this time." 
 
 This part of the turtles' mating ritual has been happening for years. "Rather than lay their eggs in peace on a quiet beach as the hard-shelled creatures in other parts of the world do, these New York turtles opt for the sand that lines the airport perimeter," DNAinfo explained last year. The Jamaica Bay Terrapin Research group tried to get down to the bottom of the phenomenon: 
 
 Where did all these terrapins come from? Like many major airports, JFK has a full-time team of wildlife biologists who have traditionally focused their attention on bird and mammal hazards to aircraft safety. Trained people were in the right place at the right time to have seen terrapins on land in large numbers in the years before the 2009 eruption, and their failure to see many terrapins probably means the number of terrapins in those days was small. JFK wildlife biologists have marked 2,426 terrapins so far, scanned each one first for our microchips and have found none. We have not detected a decline in the Rulers Bar population. Also, the airport is about 2.8 miles east of Rulers Bar, which is farther than terrapins normally roam. Finally, the airport terrapin population might have grown tremendously in the last 10 years, perhaps due to a drop in egg predation by their main nest predator, raccoons. This is the most likely explanation, although we do not know why the raccoon population would have decreased then. 
 
 In 2013, the Port Authority installed plastic tubing to act as a barrier, leading to a nearly 50% drop in turtles on the airfield. But it turns out those barriers are underwater during high tide...
– Bird strikes at New York City-area airports have been known to cause emergency landings, but a different type of creature kept some planes from even taking off this week, the AP reports. As part of their annual migration ritual, about 40 diamondback terrapin turtles emerged from Jamaica Bay Friday afternoon and creeped onto the runways at JFK International Airport in Queens, causing some flight holdups, per the Port Authority of New York and New Jersey. "There were planes briefly stuck in [the] queue," a Port Authority spokeswoman tells the New York Daily News, adding that although it's turtle mating season, the event "was a little unusual." Experts told DNAinfo last year that although turtles typically head to the beach to lay their eggs, NYC turtles seem to like the sand that surrounds this particular airport. Officials say that when pilots spot a turtle in their taxiing path, they'll either hang out until the turtle moves on or have airport staff move the turtle from harm's way. Gothamist rounded up some passenger reaction to Friday's event, with one commenter calling it "perhaps the only excuse I have ever found endearing." (At least the turtles didn't fall out of this guy's pants.)