Antipredator Behavior of Adult and Nestling Red-winged Blackbirds (Agelaius phoeniceus)

2017 ◽  
Vol 129 (3) ◽  
pp. 637-640 ◽  
Author(s):  
Ken Yasukawa ◽  
Emily J. Dorjath ◽  
Stephanie K. Morgan
Keyword(s):  
Antipredator Behavior ◽  
Agelaius Phoeniceus

Red-winged Blackbird (Agelaius phoeniceus)

2020 ◽  
Author(s):  
Ken Yasukawa ◽  
William A. Searcy
Keyword(s):  
Agelaius Phoeniceus

scholarly journals Parrot Free-Flight as a Conservation Tool

Diversity ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 254
Author(s):  
Constance Woodman ◽  
Chris Biro ◽  
Donald J. Brightsmith
Keyword(s):  
Antipredator Behavior ◽  
Survival Rates ◽  
Flight Time ◽  
Flight Training ◽  
Wild Food ◽  
Wild Populations ◽  
Free Flight ◽  
Training Technique ◽  
Outdoor Environments ◽  
Raptor Conservation

The release of captive-raised parrots to create or supplement wild populations has been critiqued due to variable survival rates and unreliable flocking behavior. Private bird owners free-fly their parrots in outdoor environments and utilize techniques that could address the needs of conservation breed and release projects. We present methods and results of a free-flight training technique used for 3 parrot flocks: A large-bodied (8 macaws of 3 species and 2 hybrids), small-bodied (25 individuals of 4 species), and a Sun Parakeet flock (4 individuals of 1 species). Obtained as chicks, the birds were hand-reared in an enriched environment. As juveniles, the birds were systematically exposed to increasingly complex wildland environments, mirroring the learning process of wild birds developing skills. The criteria we evaluated for each flock were predation rates, antipredator behavior, landscape navigation, and foraging. No parrots were lost to predation or disorientation during over 500 months of free-flight time, and all birds demonstrated effective flocking, desirable landscape navigation, and wild food usage. The authors conclude that this free-flight method may be directly applicable for conservation releases, similar to the use of falconry methods for raptor conservation.

scholarly journals Factors Affecting Thanatosis in the Braconid Parasitoid Wasp Heterospilus prosopidis

Insects ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 48
Author(s):  
Mio Amemiya ◽  
Kôji Sasakawa
Keyword(s):  
Life History ◽  
Antipredator Behavior ◽  
Parasitoid Wasp ◽  
Ecological Perspective ◽  
Background Color ◽  
Factors Affecting ◽  
Death Feigning ◽  
Heterospilus Prosopidis ◽  
History Of

Thanatosis, also called death feigning, is often an antipredator behavior. In insects, it has been reported from species of various orders, but knowledge of this behavior in Hymenoptera is insufficient. This study examined the effects of sex, age (0 or 2 days old), temperature (18 or 25 °C), and background color (white, green, or brown) on thanatosis in the braconid parasitoid wasp Heterospilus prosopidis. Thanatosis was more frequent in 0-d-old individuals and in females at 18 °C. The duration of thanatosis was longer in females, but this effect of sex was weaker at 18 °C and in 0-d-old individuals. The background color affected neither the frequency nor duration. These results were compared with reports for other insects and predictions based on the life history of this species, and are discussed from an ecological perspective.

Quantifying human disturbance on antipredator behavior and flush initiation distance in yellow-bellied marmots

2011 ◽  
Vol 129 (2-4) ◽  
pp. 146-152 ◽  
Author(s):  
Chunwang Li ◽  
Raquel Monclús ◽  
Terry L. Maul ◽  
Zhigang Jiang ◽  
Daniel T. Blumstein
Keyword(s):  
Human Disturbance ◽  
Antipredator Behavior

Quantifying insect predation with predator exclusion cages: the role of prey antipredator behavior as a source of bias

2015 ◽  
Vol 157 (3) ◽  
pp. 360-364 ◽  
Author(s):  
Ignacio Castellanos ◽  
Pedro Barbosa ◽  
Iriana Zuria ◽  
Astrid Caldas
Keyword(s):  
Antipredator Behavior ◽  
Predator Exclusion ◽  
Insect Predation

scholarly journals Antipredator behavior in blackbirds: habituation complements risk allocation

2008 ◽  
Vol 20 (2) ◽  
pp. 371-377 ◽  
Author(s):  
Iñaki Rodriguez-Prieto ◽  
Esteban Fernández-Juricic ◽  
José Martín ◽  
Yohana Regis
Keyword(s):  
Antipredator Behavior ◽  
Risk Allocation

scholarly journals Sora (Porzana carolina) Parasitism of Red-winged Blackbird (Agelaius phoeniceus) Nests

2018 ◽  
Vol 131 (4) ◽  
pp. 312-316
Author(s):  
Lawrence D. Igl
Keyword(s):  
North Dakota ◽  
Agelaius Phoeniceus ◽  
Brood Parasite ◽  
Nest Sites ◽  
Porzana Carolina

Sora (Porzana carolina) is a conspecific brood parasite that also occasionally parasitizes nests of other species. Sora parasitism in nests of passerines is rare. Of 129 Red-winged Blackbird (Agelaius phoeniceus) nests found in North Dakota in 2009 and 2010, two (1.6%) were parasitized by Soras. The conditions favouring this rare parasitic behaviour may include competition for nest sites and high Sora density.

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