Table 1.
Sample sizes of feathers from each species, population, year and sex (male/female) in each treatment group. (See text for explanation of treatments.)
| population | year | control | pre-deployment from non-returning geolocator birds | pre-deployment from returning geolocator birds | post-deployment from geolocator birds | population total |
|---|---|---|---|---|---|---|
| tree swallows | ||||||
| Long Point, ON | 2011 | 0 | 0 | 2/6 | 0 | 8 |
| 2012 | 0/1 | 0 | 0 | 6/7 | 14 | |
| 2013 | 3/5 | 0 | 0 | 2/2 | 12 | |
| total | 3/6 | 0 | 2/6 | 8/9 | 34 | |
| St Denis, SK | 2011 | 0 | 0 | 0 | 0 | 0 |
| 2012 | 4/0 | 0 | 0 | 8/2 | 14 | |
| 2013 | 0 | 0 | 0 | 0 | 0 | |
| total | 4/0 | 0 | 0 | 8/2 | 14 | |
| Prince George, BC | 2011 | 0/2 | 0 | 0/2 | 0 | 4 |
| 2012 | 5/7 | 5/11 | 5/4 | 0/1 | 38 | |
| 2013 | 5/5 | 0 | 0 | 5/5 | 20 | |
| total | 10/14 | 5/11 | 5/6 | 5/6 | 62 | |
| Saukville, WI | 2011 | 0/0 | 13/16 | 9/1 | 0 | 39 |
| 2012 | 2/8 | 0 | 0 | 9/1 | 20 | |
| total | 2/8 | 13/16 | 9/1 | 9/1 | 59 | |
| barn swallows | ||||||
| Auburn, AL | 2013 | 1/8/3a | 0 | 0 | 2/0 | 14 |
| Greenville, MS | 2013 | 7/9 | 0 | 0 | 0/1 | 17 |
| Seattle, WA | 2013 | 6/6 | 0 | 0 | 1/1 | 14 |
| Sackville, NB | 2013 | 6/9 | 0 | 0 | 0/2 | 17 |
| Prince Albert NP, SK | 2013 | 7/6 | 0 | 0 | 1/1 | 15 |
| Lombardy, IT | 2012 | 6/3 | 0 | 0 | 12/4 | 25 |
| 2013 | 2/0 | 0 | 0 | 2/0 | 4 | |
| total | 8/3 | 0 | 0 | 14/4 | 29 | |
| Piedmont, IT | 2012 | 11/3 | 0 | 0 | 11/3 | 28 |
| 2013 | 8/0 | 0 | 0 | 8/0 | 16 | |
| total | 19/3 | 0 | 0 | 19/3 | 44 | |
| Magadino, CH | 2012 | 13/3 | 0 | 0 | 13/3 | 32 |
aunknown sex.