Hadrosaurid (duck-billed) dinosaur bonebeds are exceedingly prevalent in upper Cretaceous (Campanian–Maastrichtian) strata from the Midwest of North America (especially Alberta, Canada, and Montana, U.S.A) but are less frequently documented from more northern regions. The Wapiti Formation (Campanian–Maastrichtian) of northwestern Alberta is a largely untapped resource of terrestrial palaeontological information missing from southern Alberta due to the deposition of the marine Bearpaw Formation. In 2018, the Boreal Alberta Dinosaur Project rediscovered the Spring Creek Bonebed, which had been lost since 2002, along the northern bank of the Wapiti River, southwest of Grande Prairie. Earlier excavations and observations of the Spring Creek Bonebed suggested that the site yielded young hadrosaurines. Continued work in 2018 and 2019 recovered ~300 specimens that included a minimum of eight individuals, based on the number of right humeri. The morphology of several recovered cranial elements unequivocally supports lambeosaurine affinities, making the Spring Creek sample the first documented occurrence of lambeosaurines in the Wapiti Formation. The overall size range and histology of the bones found at the site indicate that these animals were uniformly late juveniles, suggesting that age segregation was a life history strategy among hadrosaurids. Given the considerable size attained by the Spring Creek lambeosaurines, they were probably segregated from the breeding population during nesting or caring for young, rather than due to different diet and locomotory requirements. Dynamic aspects of life history, such as age segregation, may well have contributed to the highly diverse and cosmopolitan nature of Late Cretaceous hadrosaurids.

中文翻译：

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来自加拿大阿尔伯塔省西北部的坎帕尼亚·瓦皮蒂组晚期的幼年lambeosaurine（鸟眼：Hadrosauridae）的Taphonomy和分类学

Hadrosaurid（鸭嘴）恐龙骨床在北美中西部（尤其是加拿大的艾伯塔省和美国的蒙大拿州）的上白垩统（坎潘－马斯特里赫特）地层中极为盛行，但较少见于北部地区。艾伯塔省西北部的Wapiti组（Campanian–Maastrichtian）是由于海洋Bearpaw组的沉积而从艾伯塔省南部缺失的大量未开发的陆地古生物学信息资源。2018年，阿尔伯塔省北方恐龙项目在大草原西南部的Wapiti河北岸重新发现了自2002年以来丢失的Spring Creek骨床。较早的挖掘和对Spring Creek骨床的观测表明，该地点产生了年轻的鸭嘴龙。根据右肱骨的数量，2018年和2019年的继续工作回收了约300个标本，其中至少包括八个人。几种回收的颅骨元素的形态明确地支持了lamosaosaurine的亲和力，使Spring Creek样品成为Wapiti组中首次记录的lambeosaurines的出现。在现场发现的骨头的整体大小范围和组织学表明，这些动物是统一的晚幼体，这表明年龄分离是鸭嘴龙的一种生活史策略。鉴于Spring Creek lamauosaurines的体型相当大，它们可能在筑巢或照顾幼年时与繁殖种群隔离开来，而不是由于饮食和运动需求的不同。生活史的动态方面，例如年龄隔离，