HABITAT SUITABILITY INDEX MODELS: PILEATED WOODPECKER

Variable (definition)Average dbh of snags> 38 cm (15 inches) dbh[the average diameterof all snags that exceed38 cm (IS inches) diameterat breast height (1.4 m/4.5 ft)].Number of snags > 51 cm(20 inches) dbh/0.4 ha(1.0 acre) [the numberof standing dead treesor partly dead trees,that are greater than51 cm (20 inches) diameterat breast height(1.4 m/4.5 ft), and thatare at least 1.8 m (6 ft)tall, per 0.4 ha (1.0 acre).Trees in which at least50% of the branches havefallen, or are presentbut no longer bearfo1iQge, are to be consideredsnags].v, Average dbh of snags> 51 cm (20 inches)dbh [the averagediameter of all snagsthat exceed 51 cm(20 inches) diameterat breast height(1.4 m/4.5 ft)J.Cover typesEF,DF,EFW,DFWEF,DF,EFW,D~EF,DF,EFW,DFWSuggested technigueQuadrat; Biltmorestick or diametertapeQuadratQuadrat; Biltmorestick or diametertapeSOURCES OF OTHER MODELSFigure 2.(concluded).Conner and Adkisson (1976) have developed a discriminant function mod~lfor the pi1eated woodpecker that can be used to separate habitats that possiblyprovide nesting habitat from those that do not provide nesting habitat. Themodel assesses basal area, number of stems, and canopy height of trees.13