Source data from Sottas C., Reif J., Kuczynski L., Reifová R. (2018): Interspecific competition promotes habitat and morphological divergence in a secondary contact zone between two hybridizing songbirds. Journal of Evolutionary Biology. ====================================================================== A XLSX spreadsheet containing data on morphology and habitat of Common Nightingale (Luscinia megarhynchos) and Thrush Nightingale (Luscinia luscinia) in the sympatric zone. Description of variables (for details, see Methods) Individual_ID : identity of the nightingale individual Species_ID : species identity (LM: Common Nightingale (Luscinia megarhynchos); LL: Thrush Nightingale (Luscinia luscinia)) Region : region where the individual was captured (SYM: sympatry) Site : site where the individual was captured (ALO: allotopy, SYN: syntopy) Latitude : geographic coordinate (north–south position) Longitude : geographic coordinate (west-east position) PC3 : scores of the principal component 3 (PC3) based on the PCA from Reifova et al. (2011) reflecting the relative bill size Elevation : elevation above sea level in meters TWI : topographic wetness index Temperature : annual mean temperature in degrees Celsius Presence-absence matrix of plant taxa in the nightingale territories within a radius of 50 m around the location of capture of a given individual (1: presence, 0: absence). Black_locus : Black locust (Robinia pseudoacacia) Elder : Elder (Sambucus nigra) Euonymus : Eeuonymus (Euonymus sp.) Oak : Oak (Quercus sp.) Hawthorn : Hawthorn (Crataegus sp.) Pear_tree : Pear tree (Pyrus communis) European_ash : European ash (Fraxinus excelsior) Maple : Maple (Acer sp.) Elme : Elme (Ulmus sp.) Viburnum : Viburnum (Viburnum sp.) Hazel : Hazel (Corylus avellana) Alder : Alder (Alnus sp.) Blackthorn : Blackthorn (Prunus spinosa) Reed : Reed (Phragmites australis) Hackberry : Hackberry (Prunus padus) Dogwood : Dogwood (Cornus sp.) Lilac : Lilac (Syringa vulgaris) Rose : Rose (Rosa sp.) Poplar : Poplar (Populus sp.) Willow : Willow (Salix sp.)