Johnson and Haight Environmental Consultants

South Tucson, AZ, United States

Johnson and Haight Environmental Consultants

South Tucson, AZ, United States

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Johnson R.R.,Johnson and Haight Environmental Consultants | Haight L.T.,Johnson and Haight Environmental Consultants
Wilson Journal of Ornithology | Year: 2010

The first instance of vocal mimicry is reported for the western subspecies of Curve-billed Thrasher (Toxostoma curvirostre palmeri). A Curve-billed Thrasher engaged in countersinging with a migrating Black-headed Grosbeak (Pheucticus melanocephalus) near Tucson, Arizona. Night-time singing by Curve-billed Thrasher is also documented for the first time. At least three responding Curve-billed Thrashers engaged in spontaneous song near Tucson, Arizona. Additional night-time singing was elicited by playback recordings © 2010 by the Wilson Ornithological Society.


Johnson R.R.,Johnson and Haight Environmental Consultants | Hopp S.L.,Emory & Henry College
Wilson Journal of Ornithology | Year: 2010

Two mixed pairs of towhees were found in irrigated desert yards near Tucson, Arizona. The first known towhee F1 hybrids, from a female Pipilo aberti (Abert's Towhee) and male P. fuscus (Canyon Towhee) were studied from winter of 1998-1999 through summer 2000. This mixed pair raised at least eight young in three broods during the two breeding seasons. Young were so similar to P. fuscus that, if seen outside this context, they would probably not be identified as hybrids. A second mixed pair, also near Tucson, suggests that hybridization between P. aberti and P. fuscus may be more common than originally thought. Lack of previously reported hybridization between P. aberti and P. fuscus may be either due to internal or external isolating mechanisms, limited survival and longevity, or human failure to recognize hybrids. © 2010 by the Wilson Ornithological Society.


Johnson R.R.,Johnson and Haight Environmental Consultants | Haight L.T.,Johnson and Haight Environmental Consultants
Wilson Journal of Ornithology | Year: 2011

We studied the poorly understood Black Catbird (Melanoptila glabrirostris), a near threatened mimid, at Lighthouse Reef in northeastern Belize. A resident of coastal lowlands and offshore islands, this endemic species of the Yucatan Peninsula has been reported as extirpated from several localities and has declined in numbers at other sites. We found it relatively common on the larger of two islands that comprise Northern Two Cayes from 18 to 25 June 2005. It had not been reported there since first discovered at Lighthouse Reef in 1862 and was considered extirpated until we rediscovered it. The Black Catbird at Northern Two Cayes displayed fierce intraspecific territoriality and both males and females defended against aggressors. However, it exhibited no interspecific territoriality toward its nearest avian associate, the Mangrove Warbler (Dendroica petechia bryanti). It used wing-flashing in territorial defense, mating rituals, and while foraging on the ground. We estimated ∼10 pairs of Black Catbirds in a 3-ha study area in the buttonwood-coconut (Conocarpus-Cocos) ecosystem but made no attempt to estimate the size of an apparently larger population in the more extensive area of coastal scrub on the remainder of the island. The defended territory of the pair studied most extensively was 100 ×-25 m, centering on a buttonwood (Conocarpus erectus) grove and included numerous coconut (Cocos nucifera) trees. © 2011 by the Wilson Ornithological Society.

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