Table 1. Average, minimum, and maximum densities (cones/mm²) of the 26 house sparrows.

Cone type	Mean Density*	Percentage	Minimum bird mean	Maximum bird mean	Minimum site	Maximum site
All cones	71,034±1,288	100.00%	60,353	82,029	24,800	155,600
Double	26,243±472	36.94%	21,929	32,757	8,000	64,400
Single	44,791±837	63.06%	35,701	56,390	14,000	91,200
LWS	11,812±374	16.63%	9,067	18,311	2,000	25,067
MWS	13,587±285	19.13%	10,476	16,589	4,000	25,600
SWS	13,508±250	19.02%	10,481	16,000	3,600	31,600
UVS	5,884±147	8.28%	4,529	7,280	800	18,000

*Mean density: average of bird means ± SEM; values are for pooled retinas for each individual.