The small tree finch (Camarhynchus parvulus) is a bird species belonging to the Darwin's finch group within the tanager family Thraupidae.
It has a grasping beak with curved culmens.[2] Its natural habitats are subtropical or tropical dry forests and subtropical or tropical dry shrubland. During the non-breeding season it is known to form large groups with small ground-finches.
It is an endemic species to the Galapagos islands and its conservation status has been listed as “Least Concern”.[1][3] However, bird counts which have been conducted since 1997 have shown a continuous decline in small tree-finch populations in the Scalesia and agricultural zones of Santa Cruz, where the small tree-finch is most abundant. Small tree-finch counts have remained stable in the transition zone (also quite abundant here) and in the less popular dry and fern zones on Santa Cruz island.[4] A recent study has found that this species is in particularly impacted by the larvae of the parasitic avian vampire fly (Philornis downsi).[5]
^ abBirdLife International (2016). "Geospiza parvula". IUCN Red List of Threatened Species. 2016: e.T22723778A94832505. doi:10.2305/IUCN.UK.2016-3.RLTS.T22723778A94832505.en. Retrieved 16 May 2024.
^Tebbich, Sabine; Taborsky, Michael; Fessl, Birgit; Dvorak, Michael; Winkler, Hans (2004-02-01). "Feeding Behavior of Four Arboreal Darwin's Finches: Adaptations to Spatial and Seasonal Variability". The Condor. 106 (1): 95–105. doi:10.1093/condor/106.1.95. ISSN 0010-5422.
^Dvorak, Michael; Fessl, Birgit; Nemeth, Erwin; Kleindorfer, Sonia; Tebbich, Sabine (January 2012). "Distribution and abundance of Darwin's finches and other land birds on Santa Cruz Island, Galápagos: evidence for declining populations". Oryx. 46 (1): 78–86. doi:10.1017/S0030605311000597. ISSN 0030-6053.
^Cimadom, Arno; Tebbich, Sabine (January 2021). "Timing of infestation influences virulence and parasite success in a dynamic multi-host–parasite interaction between the invasive parasite, Philornis downsi, and Darwin's finches". Oecologia. 195 (1): 249–259. Bibcode:2021Oecol.195..249C. doi:10.1007/s00442-020-04807-5. ISSN 0029-8549. PMC 7882474. PMID 33258992.
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