Did complex song and dance co-evolve with brain size in the Birds of Paradise (Aves: Paradisaeidae)?

Complex signalling behaviors, such as avian song and courtship displays, have been associated with increases in both absolute and relative brain size, presumably mediated by relationships between brain size and motor coordination and learning abilities. Nonetheless, reliably establishing these relationships is challenging due to the difficulty of quantifying behavioral complexity. Birds of paradise perform some of the most elaborate avian courtship displays, involving a striking degree of complexity and motor coordination, which makes them interesting models for investigating the evolution of complex motor learning abilities in birds. Here, we compiled a μCT-based brain size dataset of more than half of the known species of birds of paradise and used multiple metrics of display complexity to test the hypothesis that larger brains are associated with more elaborate repertoires of motor and vocal displays. We found no clear evidence tha..., , # Did complex song and dance co-evolve with brain size in the Birds of Paradise (Aves: Paradisaeidae)?

Dataset DOI: [10.5061/dryad.qz612jmsr](10.5061/dryad.qz612jmsr)

## Description of the data and file structure

Data for this project is based on previously published behavioural and vocal complexity scores (see methods in paper) and an endocranial volume dataset collected for this project based on micro-CT scanned museum specimens. 

### Files and variables

Empty cells in the data are simply missing values (NAs) where we couldn’t obtain a measurement, either from the literature (for complexity scores and body size data) or for brain size measurements (our data).

#### File: diagnostic\_fcns.r

**Description:** Roger Mundry's linear model diagnostic functions.

#### File: influ\_phylm2\_Paterno\_et\_al.R

**Description:** PGLS model diagnostics (see methods of manuscript) 

#### File: Ligon.et.al.\_UltrametricTree

**Description:** Bird-of-paradise phylogeny 

#### File: plot\_influ\...,