Current Status of Northern Beardless-Tyrannulet and Tropical Parula in Bentsen-Rio Grande Valley State Park and Santa Ana National Wildlife Refuge, Southern Texas

Authors

Tim Brush, University of Texas-Pan American

Publication Date

6-1-1999

Abstract

There are no published records of Northern Beardless-Tyrannulet (Camptostoma imberbe) and Tropical Parula (Parilla pitiayumi) nesting in the Lower Rio Grande Valley of Texas since the late 1940s. In this 1996- 1998 study, both species were confirmed nesting at Santa Ana National Wildlife Refuge, and Northern Beardless-Tyrannulet was also confirmed at BentsenRio Grande Valley State Park. Most Northern Beardless-Tyrannulet nests were between clumps of ball-moss (Tillandsia recurvata) in cedar elm (Ulmus crassifolia) trees, and nests were active from 21 March-23 September. Only fe. males build nests or incubate. Two-three young fledged per successful nest, but three nests were abandoned after heavy rains. Tropical Parulas maintained 2-5 tetTitories/year at Santa Ana but were absent from Bentsen-Rio Grande Valley State Park. A Tropical Parula pair fed a fledgling Brown-headed Cowbird (Molothms ater) at Santa Ana in 1997.

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Recommended Citation

Brush, Tim (1999) "Current Status of Northern Beardless-Tyrannulet and Tropical Parula in Bentsen-Rio Grande Valley State Park and Santa Ana National Wildlife Refuge, Southern Texas," Bulletin of the Texas Ornithological Society: Vol. 32: Iss. 1, Article 3.
Available at: https://digitalcommons.usf.edu/tos_bulletin/vol32/iss1/3