Frederickena unduliger
Silhouette: Sheatherius · PhyloPic
In 3 days <5%
The undulated antshrike (Frederickena unduliger) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, and Peru. The undulated antshrike was described by the Austrian ornithologist August von Pelzeln in 1868 and given the binomial name Thamnophilus unduliger.
The undulated antshrike's taxonomy is unresolved. The undulated antshrike is a large dark antbird, 22 to 25 cm (8.7 to 9.8 in) long and weighing 75 to 85 g (2.6 to 3.0 oz). The species exhibits significant sexual dimorphism, though both sexes of all subspecies have a crest, a brown to pale yellow iris, a heavy... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tambopata National Reserve | 🇵🇪 Peru | |
| 2 | Manu National Park | 🇵🇪 Peru |
Rare
Under 5% of wildlife watchers report an Undulated Antshrike sighting in Tambopata National Reserve on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 539th most-seen of the 550 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Undulated Antshrike in Tambopata National Reserve on a given day, so our monthly data shows no clear season.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Undulated Antshrike sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Yes
Of the 2 parks where we can rate Undulated Antshrike sightings, Tambopata National Reserve has the highest daily chance: under 5%. Next come Manu National Park (Peru, under 5%).
Same family: Thamnophilidae
The closest relatives of the Undulated Antshrike that you can see in Tambopata National Reserve (family Thamnophilidae, Typical Antbirds) are Chestnut-tailed Antbird (about 30%), White-browed Antbird (about 20%) and Plain-winged Antshrike (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Undulated Antshrike is recorded against all the birds logged in Tambopata National Reserve (5 verified sightings from 2019 to 2026), 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.
