Empidonax alnorum
Silhouette: Emily Willoughby · PhyloPic
In 3 days ~10%
The alder flycatcher (Empidonax alnorum) is a small insect-eating bird in the tyrant flycatcher family. The genus name Empidonax is from Ancient Greek empis, "gnat", and anax, "master". The specific alnorum is Latin and means "of the alders".
E. alnorum is one of the larger Empidonax species, attaining a length of 13–17 cm (5.1–6.7 in), and a weight of 12–14 g (0.42–0.49 oz). The wingspan ranges from 21–24 cm (8.3–9.4 in). The upperparts of E. alnorum are dull greenish-olive. The crown is a slightly darker olive-green than the back. The throat is white, with a darker breast band. Thin white rings surround the eyes. The bill is wide and moderate in length, with pinkish or yellow-orange lower mandible and black upper mandible. Wings are generally black, with white wing bars and white edges of the innermost secondaries (tertials). Juveniles have brownish upperparts, yellow underparts, and yellowish brown or buff wingbars.
E. alnorum is similar in appearance to the eastern wood pewee (Contopus virens) and the eastern phoebe (Sayornis phoebe), as well as the nearly identical willow flycatcher (Empidonax traillii) but E. alnorum can be distinguished by its smaller size and... Wikipedia →
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Anchorage | 🇺🇸 United States | |
| 2 | Bogota | 🇨🇴 Colombia | |
| 3 | Santa Cruz de la Sierra | 🇧🇴 Bolivia | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | Chicago | 🇺🇸 United States | |
| 6 | Montreal | 🇨🇦 Canada | |
| 7 | Edmonton | 🇨🇦 Canada | |
| 8 | San José | 🇨🇷 Costa Rica | |
| 9 | Calgary | 🇨🇦 Canada | |
| 10 | Minneapolis [Saint Paul] | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Alder Flycatcher sighting in Bogota on a given day, based on 149 verified sightings from GBIF citizen-science data. It is the 98th most-seen of the 231 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
April and October
In those months about 10% of wildlife watchers report an Alder Flycatcher in Bogota on a given day, against under 5% in May–September and November–March, the lowest months. Those are among Bogota's wettest months, with about 200 mm of rain a month against 45 mm in January.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Alder Flycatcher sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 24
Of the 24 cities where we can rate Alder Flycatcher sightings, Bogota ranks 2nd at under 5%. The best odds are in Anchorage (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Alder Flycatcher is recorded against all the birds logged in Bogota (149 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
