• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

The site was identified as internationally important for bird conservation in 2005 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
Pale-browed Tinamou Crypturellus transfasciatus	NT	resident (2003)	frequent	A1, A2, A3
Rufous-headed Chachalaca Ortalis erythroptera	VU	resident (2003)	rare	A1, A2, A3
Ecuadorian Ground Dove Columbina buckleyi	LC	resident (2003)	frequent	A2, A3
Short-tailed Woodstar Myrmia micrura	LC	resident (2003)	frequent	A2, A3
Wilson's Plover Charadrius wilsonia	LC	resident (2003)	present	A4i
Collared Plover Charadrius collaris	LC	resident (2003)	present	A4i
Ecuadorian Piculet Picumnus sclateri	LC	resident (2003)	frequent	A2, A3
Guayaquil Woodpecker Campephilus gayaquilensis	LC	resident (2003)	rare	A1
Grey-cheeked Parakeet Brotogeris pyrrhoptera	VU	resident (2003)	frequent	A1, A2, A3
Pacific Parrotlet Forpus coelestis	LC	resident (2003)	common	A2, A3
Red-masked Parakeet Psittacara erythrogenys	NT	resident (2003)	uncommon	A1, A2, A3
Collared Antshrike Thamnophilus bernardi	LC	resident (2003)	common	A2, A3
Elegant Crescentchest Melanopareia elegans	LC	resident (2003)	frequent	A2, A3
Watkins's Antpitta Grallaria watkinsi	NT	resident (2003)	uncommon	A2, A3
Pacific Hornero Furnarius cinnamomeus	LC	resident (2003)	frequent	A3
Blackish-headed Spinetail Synallaxis tithys	VU	resident (2003)	frequent	A1, A2, A3
Necklaced Spinetail Synallaxis stictothorax	LC	resident (2003)	common	A2, A3
Pacific Royal Flycatcher Onychorhynchus occidentalis	NT	resident (2003)	present	A1, A2, A3
Slaty Becard Pachyramphus spodiurus	VU	resident (2003)	present	A1, A2, A3
Pacific Elaenia Myiopagis subplacens	LC	resident (2003)	uncommon	A2, A3
Grey-breasted Flycatcher Lathrotriccus griseipectus	LC	resident (2003)	present	A1, A2, A3
Baird's Flycatcher Myiodynastes bairdii	LC	resident (2003)	frequent	A2, A3
Sooty-crowned Flycatcher Myiarchus phaeocephalus	LC	resident (2003)	uncommon	A2, A3
White-tailed Jay Cyanocorax mystacalis	LC	resident (2003)	frequent	A2, A3
Superciliated Wren Cantorchilus superciliaris	LC	resident (2003)	common	A2, A3
Ecuadorian Thrush Turdus maculirostris	LC	resident (2003)	rare	A2, A3
Plumbeous-backed Thrush Turdus reevei	LC	resident (2003)	uncommon	A2, A3
Black-capped Sparrow Arremon abeillei	LC	resident (2003)	frequent	A2, A3
White-edged Oriole Icterus graceannae	LC	resident (2003)	frequent	A2, A3
Grey-and-gold Warbler Myiothlypis fraseri	LC	resident (2003)	rare	A2, A3
Crimson-breasted Finch Rhodospingus cruentus	LC	resident (2003)	common	A2, A3

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2005. The most recent assessment (2013) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Biological resource use	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium
Agricultural expansion and intensification	happe­ning now	some of popul­ation/area (10–49%)	slow decline (1–10% over 3 gener­ations)	medium

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Whole area (>90%) covered by appropriate conservation designation	A compre­hensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Some limited conservation initiatives are in place	medium

Year	Protected Area	Designation (management category)	% coverage of IBA
2001	Arenillas	Ecological Reserve (-)	99

Habitat	% of IBA	Habitat detail
Forest	major (>10)	Second-growth or disturbed forest; Tropical deciduous forest; Mangrove
Shrubland	major (>10)	Arid lowland scrub; Second-growth or disturbed scrub
Artificial/Aquatic & Marine	minor (<10)
Artificial/Terrestrial	minor (<10)	Urban parks and gardens; Arable land; Abandoned or fallow farmland, disturbed ground
Marine Coastal/Supratidal	minor (<10)
Marine Intertidal	minor (<10)
Marine Neritic	minor (<10)

Land use	% of IBA
not utilised	major (>10)
nature conservation and research	major (>10)
military	major (>10)
agriculture	minor (<10)
hunting	minor (<10)
fisheries/aquaculture	minor (<10)

---

Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Reserva Ecológica Arenillas (Ecuador). Downloaded from https://datazone.birdlife.org/site/factsheet/reserva-ecológica-arenillas-iba-ecuador on 23/12/2024.