Table 3 Spatial scales (cavity, nest-tree, forest-stand and landscape) assessed to explore habitat preference and fitness of White-throated Treerunners (Pygarrhychas albogularis) in Andean temperate forests, Chile.

Cavity

Fresh

1: Cavity excavated during the observation year; 0: Cavity excavated in previous seasons

Entrance diameter

Horizontal diameter of the entrance of the excavated cavities (cm)

DCH

Diameter at cavity height of nest trees (cm)

Height

Height above the ground of the excavated cavities (m)

Aspect

Cardinal orientations of the excavated cavities in degrees (0° − 360°)

Cavity volume

Internal cavity volume calculated as volume of a cylinder (cm³)

Branch order

Order of tree branches where excavated cavity was located. 1: main trunk; 2 secondary branch; 3: tertiary branch

Subdecay class

Degree of decomposition of the tree branch where excavated cavity was located

Nest-tree

Tree species

Tree species where nests were found

Tree DBH

Diameter at breast height of nest trees

Decay class

Degree of decomposition of the nest trees. Decay classes assigned were 1 (live healthy tree); 2 (live unhealthy tree); 3 (recently dead tree); and 4 (long dead tree; modified from^75,76

Forest-stand

Tree density

Density of total trees in one hectare

Average DBH

Mean DBH of total trees in forest-stand

Standard deviation DBH

Standard deviation of DBH in total trees on forest-stand

Decay class mode

Mode of degree of decomposition of the total trees in forest-stand

Basal area

Basal area of forest-stand (cm²/ha)

Landscape

Forest edge

Nearest distance to forest edge from nest tree (m).

Forest area

Forest area in circular buffer of 3 ha with nest tree in the center (m²)