Ferruginous Pygmy-Owl

Glaucidium brasilianum

The ferruginous pygmy owl is a species of small owl found in the southwestern United States, extending south through Mexico, Central America, and into South America, including countries like Brazil, Bolivia, Paraguay and Argentina. Source

Where it is now

In the last 8 weeks this bird was recorded 1,649 times across 16 areas (each area is a 5 degree square).

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Movement and weather

Each season it is first heard regularly where daytime highs are around 29°C (typically 27 to 30°C, from 7 areas). That holds across 45° of latitude, which suggests its timing follows temperature more than the calendar.

Over the weeks it was present in the past year, its centre in North America ranged from 14°N in January to 23°N in May, about 900 km apart.

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.