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The site was identified as internationally important for bird conservation in 2007 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List	Season (year[s] of estimate)	Size	IBA criteria
Black Guan Chamaepetes unicolor	LC	breeding (2006)	250-999 birds	A1, A2, A3
Great Curassow Crax rubra	VU	breeding (2006)	50–150 birds	A1
Black-breasted Wood-quail Odontophorus leucolaemus	LC	breeding (2006)	unknown	A2, A3
Buff-fronted Quail-Dove Zentrygon costaricensis	LC	breeding (2006)	unknown	A2, A3
Purplish-backed Quail-Dove Zentrygon lawrencii	LC	breeding (2006)	unknown	A2, A3
Chiriquí Quail-Dove Zentrygon chiriquensis	LC	breeding (2006)	unknown	A2, A3
Fiery-throated Hummingbird Panterpe insignis	LC	breeding (2006)	unknown	A2, A3
Purple-throated Mountain-gem Lampornis calolaemus	LC	breeding (2006)	unknown	A2, A3
Magenta-throated Woodstar Philodice bryantae	LC	breeding (2006)	unknown	A2, A3
Coppery-headed Emerald Microchera cupreiceps	LC	breeding (2006)	unknown	A2, A3
Collared Trogon Trogon collaris	LC	breeding (2006)	unknown	A2, A3
Keel-billed Motmot Electron carinatum	VU	breeding (2006)	< 50 birds	A1
Streak-crowned Antvireo Dysithamnus striaticeps	LC	breeding (2006)	unknown	A2
Silvery-fronted Tapaculo Scytalopus argentifrons	LC	breeding (2006)	unknown	A2, A3
Streak-breasted Treehunter Thripadectes rufobrunneus	LC	breeding (2006)	unknown	A2, A3
Ruddy Treerunner Margarornis rubiginosus	LC	breeding (2006)	unknown	A2, A3
Bare-necked Umbrellabird Cephalopterus glabricollis	EN	breeding (2006)	30–50 birds	A1, A2, A3
Tawny-chested Flycatcher Aphanotriccus capitalis	VU	breeding (2006)	< 50 birds	A1, A2
Black-and-yellow Silky-flycatcher Phainoptila melanoxantha	LC	breeding (2006)	unknown	A2, A3
Golden-browed Chlorophonia Chlorophonia callophrys	LC	breeding (2006)	unknown	A2, A3
Wrenthrush Zeledonia coronata	LC	breeding (2006)	unknown	A2, A3
Black-and-yellow Tanager Chrysothlypis chrysomelas	LC	breeding (2006)	unknown	A2
Blue-and-gold Tanager Bangsia arcaei	NT	breeding (2006)	100–300 birds	A1, A2, A3
Slaty Flowerpiercer Diglossa plumbea	LC	breeding (2006)	unknown	A2, A3

Year	Protected Area	Designation (management category)	% coverage of IBA
1974	Rincón de la Vieja	Parque Nacional (II)	8
1976	Volcán Tenorio	Parque Nacional (II)	6
1976	Tenorio	Zona Protectora (VI)	3
1991	Guanacaste	Parque Nacional (II)	7
1991	Miravalles	Protective Zone (VI)	-
1999	Area de Conservación Guanacaste	World Heritage Site (natural or mixed) (UA)	18

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tilarán Highlands (Costa Rica). Downloaded from https://datazone.birdlife.org/site/factsheet/tilarán-highlands-iba-costa-rica on 09/12/2024.