TABLE 2.
Estimated distances traveled and annual cycle of seven tracked jaegers from a nest site in Arctic Canada (first year of tracking only)
| Long‐tailed Jaeger (n = 2 unless otherwise noted) | Parasitic Jaeger (n = 4 unless otherwise noted) | Pomarine Jaeger (n = 1) | |
|---|---|---|---|
| Distances traveled (km) | |||
| Maximum straight‐line distance from colony | 8890–15,418 | 5705–7146 | 14,395 |
| Estimated total distance traveled during annual cycle | 30,195–57,147 a | 28,648–40,477 a | 41,910 |
| Annual cycle | |||
| Departure from nesting area | 22 July | 30 Aug.–1 Sept. (n = 2) | 4 Aug. |
| Arrival to postbreeding staging area | 2–3 Aug. | 6–18 Sept. (n = 2) | 10 Aug./17 Sept. b |
| Departure from postbreeding staging area(s) | 20 Aug.–21 Sept. | 10 Oct–3 Dec. | 1‐Sept./26 Dec. b |
| Arrival to wintering area(s) | 5–26 Sept. | 19 Oct.−12 Dec | 27 Dec. b |
| Departure from wintering area(s) | 4 April (n = 1) | 28 April–7 May (n = 2) | 6 May |
| Arrival to prebreeding staging area | 22 April (n = 1) | 13–16 May (n = 2) | 7 May |
| Departure from prebreeding staging areas | 24 May (n = 1) | 22–25 May (n = 2) | 29 May |
| Breeding season arrival | 6–16 June (n = 1) c | Unknown | June 7–23 d |
For individual metadata, see Table 1. Not all dates during the annual cycle were available for all individuals due to cessation of tag transmissions (LTJA and PAJA) and/or incalculable locations during periods of 24‐h daylight or the equinox periods (Parasitic Jaegers tracked via light‐level geolocators).
See methods for details of estimates for birds tracked via geolocators and for birds whose tags ceased transmitting during the wintering period.
The POJA staged for 22 days off Wrangel Island, Russia 10 August–1 September. Sept 17 the bird arrived in the Oyashio Current/Sea of Okhotsk off Hokkaido, Japan where it roamed until December 26 when it commenced a migratory loop over Micronesia. We grouped the movements off of Japan as a staging period because they proceeded a 5‐month migratory loop over Micronesia and the bird also stopped in the Oyashio Current in the spring before returning to the Arctic. However, the movements off Japan could also be considered a first wintering area.
LTJA‐NI‐2019‐01 arrived at Bathurst Island June 6, 2020, but then immediately departed back to Baffin Bay. The bird returned to Bathurst Island, June 16, 2020.
June 7 = Date of Arrival to Russia, within known breeding range. June 23 = Date of arrival to Banks Island, Canada, after nomadic movements across terrestrial sites in Russia, June 7–17).