Passerines Birds [updated] -

| Species | IUCN Status | Threat | |---------|-------------|--------| | Sprague’s pipit ( Anthus spragueii ) | Vulnerable | Grassland loss | | Helmeted hornbill? No, passerine: ( Agelaius xanthomus ) | Endangered | Nest parasitism, habitat loss | | Gurney’s pitta ( Hydrornis gurneyi ) | Endangered | Deforestation (Thailand/Myanmar) | | Bachman’s warbler ( Vermivora bachmanii ) | Critically Endangered (possibly extinct) | Habitat destruction |

This arrangement allows passerines to lock their toes around a branch. When they squat down to roost, the tendons in their legs automatically tighten, clamping their feet shut. This means they can sleep securely on thin branches without falling off—even in high winds! passerines birds

You are likely already familiar with these common passerine families: | Species | IUCN Status | Threat |