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Mexican species
| Stygian Owl (Asio stygius) | |||
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| Subspecies | Hide subspecies | ||
| lambi | Highlands of w Mexico (sw Chihuahua to Jalisco) | ||
| robustus | S Mexico (Guerrero and Veracruz) to Venezuela and Ecuador | ||
| siguapa | Cuba including Isla de la Juventud. | ||
| noctipetens | Hispaniola and Gonâve I. | ||
| stygius | Eastern Peru, Bolivia, and southward to Catamarca (northwestern Argentina), eastward to northeastern Argentina and to Rio Grande do Sul (southeastern Brazil). | ||
| barberoi | Paraguay and n Argentina | ||
| Endemic status | |||
| Sound Guide | A single deep hu repeated with intervals of several seconds. | ||
| Comment | |||
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