Pet Wild Side

Episode

The Bird That Flew 7,000 Miles Without Landing

In 2007 a bar-tailed godwit called E7 flew from Alaska to New Zealand nonstop: 11,680 km in about eight days, tracked by satellite.

Updated

Painted Pet Wild Side scene for The Bird That Flew 7,000 Miles Without Landing

Case Files · Episode 1 · 15:55. Long-form episode; the video player arrives at public launch.

What the episode is about

In 2007 a bar-tailed godwit the scientists called E7 flew from Alaska to New Zealand without landing once: 11,680 kilometres in about eight days, tracked the whole way by satellite. Every date and distance comes from the scientists' own reports.

Key facts

Further reading

Scenes are painted and dramatized from the sources below. Where accounts disagree, the episode says so.

More from Case Files

Sources

  1. E7's tagging, route, dates (17 Mar, 1 May, late Aug [sources differ 29/30 Aug], 7 Sep 2007), 16 tagged birds, 5-week layover, 4,500 mi/5 days to Alaska, 125 mi west of Kauai, date line ~300 mi NNE of Fiji, North Cape, landfall 8 mi from cap
  2. 11,680 km in 8.1 days; seven tagged females 8,117-11,680 km nonstop; implanted transmitters; open questions (sleep, navigation); "ecological corridor rather than barrier?": Gill, R.E. Jr. et al. (2009) Extreme endurance flights by landbirds
  3. ~10,200 km northbound leg, Yalu Jiang on the China-North Korea border: National Geographic News (2007)
  4. Tagging partners (USGS Alaska Science Center, PRBO, Massey University, Pukorokoro Miranda Shorebird Centre, Global Flyway Network): Pukorokoro Miranda Shorebird Centre, "E7 - a Godwit on a Mission"
  5. Fat ~55% of body mass and shrunken digestive organs ("Guts don't fly"): Piersma, T. & Gill, R.E. Jr. (1998) The Auk 115: 196-203.
  6. Mean mass ~367 g of departing godwits; fat ~55%: Piersma, T., Gill, R.E. Jr. & Ruthrauff, D.R. (2021) Frontiers in Ecology and Evolution 9: 685764.
  7. Departure timed to winds; 24 tracked birds chose the best wind days; course changes around storms: Gill, R.E. Jr. et al. (2014) Animal Behaviour; USGS release
  8. 4BBRW (2020), ~12,000 km in about 9-11 days (sources differ: Miranda tracking team ~9 d; BirdLife ~11 d); flyway population; baueri ~155,000; nearly all baueri pass the northern Yellow Sea: BirdLife International
  9. 13,560 km in 11 days 1 hour (tag 234684, Oct 2022, Ansons Bay, Tasmania; ~5 months old): Guinness World Records, Longest non-stop migration by a bird
  10. ~28% of Yellow Sea tidal flats lost (1980s to late 2000s): Murray, N.J. et al. (2014) Frontiers in Ecology and the Environment 12: 267-272.
  11. Shorebirds relying most on the Yellow Sea declined fastest: Studds, C.E. et al. (2017) Nature Communications 8: 14895.
  12. Near Threatened: IUCN Red List / BirdLife International species factsheet
  13. kuaka: Te Aka Maori Dictionary
  14. Bar-tailed godwit calls: "Bar-tailed godwit.ogg" by Jamescandless, Wikimedia Commons, CC BY 3.0
  15. Barn owl screech: "American Barn Owl Screech.flac" by Daniel Polin, Wikimedia Commons, CC BY 4.0
  16. Coastlines: Natural Earth (public domain)

Scenes are painted and dramatized from published research; animal-sense views are illustrations, not measurements.

Get the free cat wild-side mini-poster when it is ready

6 everyday cat habits, the wild instinct behind each, and one thing to notice or try tonight. Every line sourced. US Letter and A4 PDF.

Get the free cat wild-side mini-poster and an occasional email. Unsubscribe anytime.