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Autor:
Thomas Borderie, Laure Cauchard
Publikováno v:
The Wilson Journal of Ornithology. 128:462-464
During winter 2015 in Montreal (Canada), we observed on two occasions a group of House Sparrows (Passer domesticus) hiding under the body of several cars, in the empty spaces between the wheels and the fender. On both occasions, it was either snowing
Autor:
Julio C. Gallardo
Publikováno v:
The Wilson Journal of Ornithology. 131:199
I describe a White-banded Swallow (Atticora fasciata) diving under water to avoid predation by a Bat Falcon (Falco rufigularis) in Madre de Dios River, Peru. On 3 September 2006 I observed a White-banded Swallow plunge-diving under water for a distan
Publikováno v:
The Wilson Journal of Ornithology. 130:778
We first observed Sora (Porzana carolina) swimming and diving under water while capturing them with hand nets at night. Since that time, we have observed the behavior several times and documented it with photos and video. Rails are among the most elu
Autor:
James D. Fraser, Jonathan B. Cohen
Publikováno v:
The Wilson Journal of Ornithology. 122:578-582
Migratory birds arriving in breeding areas should select territories that maximize reproduction and survival. Prey available prior to egg laying may be as important as prey availability for chicks later in the season. We sampled benthic and terrestri
Publikováno v:
The Wilson Journal of Ornithology. 129:632
We describe a new predator-prey relationship between Herring Gulls (Larus argentatus) and Chimney Swifts (Chaetura pelagica) at a communal roost in Sault Ste. Marie, ON, Canada. In a season-long study in 2015, we document 38 instances of predation, a
Publikováno v:
The Wilson Journal of Ornithology. 120:311-319
Habitat loss, introduced predators, and hybridization with feral Mallards (Anas platyrhynchos) continue to threaten the existence of the endangered Hawaiian Duck or Koloa maoli (A. wyvilliana). Protection and management of core breeding areas is a re
Autor:
Paul Hendricks, Lisa M. Hendricks
Publikováno v:
The Wilson Journal of Ornithology. 123:409-411
We observed three Common Ravens (Corvus corax) hunting for live sand crabs (Emerita analoga) during low tide on Netarts Spit, Oregon in mid-August 2010. One raven successfully extracted four crabs in five attempts during a 5-min period. The ravens hu
Autor:
Jerome A. Jackson, William E. Davis
Publikováno v:
The Wilson Journal of Ornithology. 119:758-760
We report observations of Willets (Catoptrophorus semipalmatus) using White Ibis (Eudocimus albus) as “beaters” to disturb prey and kleptoparasitizing (stealing) prey from them. Our observations occurred at J. N. “Ding” Darling National Wildl
Autor:
Christina E. Donehower
Publikováno v:
The Wilson Journal of Ornithology. 118:420-422
Great Black-backed Gulls (Larus marinus) are known to prey upon a wide range of bird species, particularly adults, young, and eggs of seabirds and waterfowl. Here, I provide the first account of Great Black-backed Gulls pursuing and attacking, in fli
Autor:
Pierre A. Pistorius
Publikováno v:
The Wilson Journal of Ornithology. 120:631-632
Grey Herons (Ardea cinerea) typically prey upon fish and other aquatic organisms with occasional reports of predating small birds. I report observations of one or more Grey Herons predating on Aldabra White-throated Rails (Dryolimnas cuvieri aldabran