Nest Success and Cavity Data for Cavity Nesting Birds

Species column contains four letter codes for each bird species. GFWO = Golden-fronted woodpecker, ATBC = ash-throated/brown-crested flycatchers, BCTI = black-crested titmouse, BEWR = Bewick's wren, EASO = Eastern Screech owl, LBWO = ladder-backed woodpecker. <br><br>Nest.cover is percent of nest that was covered with vegetation<br> <br>result is whether or not the cavity had an attempted nest <br><br>Origin is the type of cavity, whether an abandoned woodpecker nest or a naturally occurring cavity. <br><br>Height is the height of the cavity in the tree, in meters<br><br>decay is the rank level of decay of the tree, 1-7<br><br>DBH is the diameter of the tree at breast height, in centimeters<br><br>hole is the diameter of the cavity opening, in centimeters. <br><br>depth is the depth of the cavity, in millimeters. <br>

物种列（Species column）包含每种鸟类的四字母分类代码，各代码对应物种如下：GFWO = 额腹啄木鸟（Golden-fronted woodpecker），ATBC = 灰喉/棕冠鹟（ash-throated/brown-crested flycatchers），BCTI = 黑冠山雀（black-crested titmouse），BEWR = 贝威氏鹪鹩（Bewick's wren），EASO = 东方鸣鸮（Eastern Screech owl），LBWO = 梯背啄木鸟（ladder-backed woodpecker）。

Nest.cover列表示巢穴被植被覆盖的百分比。

result列用于指示该树洞是否存在筑巢尝试。

Origin列表示树洞的成因类型，分为废弃啄木鸟巢穴与自然形成树洞两类。

Height列为树内树洞的离地高度，单位为米。

decay列为树木腐朽等级，取值范围为1至7。

DBH列为树木胸径（diameter at breast height），单位为厘米。

hole列为树洞开口的直径，单位为厘米。

depth列为树洞内部深度，单位为毫米。