Diets of Insectivorous Birds Along the Colorado River in Grand Canyon, Arizona

Yard, Helen K.; Riper, Charles van; Brown, Barbara; Kearsley, Michael J. C.

doi:10.1650/7242

Cited by 45 publications

(43 citation statements)

References 24 publications

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“…Moorman et al (2007) reported that Coleopterans and Hemipterans formed the major diet of foliage-gleaning and ground-gleaning insectivorous birds. Many other investigators also have determined Coleopterans, Hemipterans and Hymenopterans (Mason & Maxwell-Lefroy 1912;Sodhi 1986;Kaspari & Joern 1993;Parasharya et al 1994;Sivakumaran & Thiyagesan 2003;Yard et al 2004;Asokan et al 2008) as primary food resource of insectivorous birds.…”

Section: Resultsmentioning

confidence: 99%

Diet of three insectivorous birds in Nagapattinam District, Tamil Nadu, India – a preliminary study

Asokan¹,

Ali²,

Manikannan³

2009

J. Threat. Taxa

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Section: Resultsmentioning

confidence: 99%

Diet of three insectivorous birds in Nagapattinam District, Tamil Nadu, India – a preliminary study

Asokan¹,

Ali²,

Manikannan³

2009

J. Threat. Taxa

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“…As fecal samples and stomach contents provide highly fragmented materials, allowing only low taxonomic identification, in general at the order level, it is possible that greater differences are not detected by the limited accuracy of identifying the preys (Chapman and Rosenberg, 1991;Mestre et al, 2010). However, this level of identification has allowed differences to be detected in other studies (Sherry, 1984;Poulin and Lefebvre, 1996;Yard et al, 2004). In contrast, ecological differences were seen in relation to niche width.…”

Section: Discussionmentioning

confidence: 99%

Feeding resource partitioning between two understorey insectivorous birds in a fragment of Neotropical cloud forest

2015

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The food habits and niche overlap based on diet composition and prey size of two species of understorey insectivorous birds were investigated in an area of montane rain forest in the state of Minas Gerais, southeastern Brazil. A total of 43 birds were captured: 33 individuals of Conopophaga lineata (Conopophagidae) with 13 recaptures, and 10 individuals of Myiothlypis leucoblephara (Parulidae) with 12 recaptures, from which were obtained respectively 33 and 10 fecal samples. Fragments of 16 groups of arthropods, plus insect eggs, were identified in these samples. Conopophaga lineata predominantly consumed Formicidae (32%) and Isoptera (23.6%). However, the index of alimentary importance (AI) of Isoptera (3.53) was lower than other groups such as Formicidae (AI = 61.88), Coleoptera (AI = 16.17), insect larvae (AI = 6.95) and Araneae (AI = 6.6). Myiothlypis leucoblephara predominantly consumed Formicidae (28.2%) and Coleoptera (24.4%), although Coleoptera and Hymenoptera non-Formicidae had the highest values of AI (38.71 and 22.98 respectively). Differences in the proportions of the types of arthropods consumed by birds were not enough to reveal their separation into feeding niches (overlap = 0.618, p observed ≤ expected = 0.934), whereas differences in the use of resources was mainly due to the size of the prey (p<0.001), where C lineata, the species with the highest body mass (p<0.001) consumed larger prey. It is plausible that prey size is an axis of niche dimension that allows the coexistence of these species.Keywords: birds, cloud forest, insectivores, Neotropical region, niche. Partição de recursos alimentares entre duas espécies de aves insetívoras desub-bosque em um fragmento de floresta nebular Neotropical ResumoOs hábitos alimentares e a sobreposição de nicho em termos de composição da dieta e tamanho de presas de duas espécies de aves insetívoras de sub-bosque foram investigados em uma área de floresta ombrófila altomontana no estado de Minas Gerais, sudeste do Brasil. Foram capturados 33 indivíduos de Conopophaga lineata (Conopophagidae), com 13 recapturas, e 10 indivíduos de Myiothlypis leucoblephara (Parulidae), com 12 recapturas, dos quais foram obtidas, respectivamente, 33 e 10 amostras fecais, onde foram identificados fragmentos de 16 grupos de artrópodes, além de ovos de insetos. Conopophaga lineata consumiu predominantemente Formicidae (32%) e Isoptera (23,6%). Contudo, o índice de importância alimentar (IA) de Isoptera (3,53) esteve abaixo de outros grupos como Formicidae (IA = 61,88), Coleoptera (IA = 16,17), larva de inseto (IA = 6,95) e Araneae (IA = 6,6). Myiothlypis leucoblephara consumiu predominantemente Formicidae (28,2%) e Coleoptera (24,4%), embora em termos de IA o predomínio tenha sido de Coleoptera (IA = 38,71) e Hymenoptera não Formicidae (IA = 22,98). Diferenças nas proporções dos tipos de artrópodes consumidos pelas aves não foram suficientes para revelar separação em seus nichos alimentares (sobreposição = 0,618; p observado ≤ esperado = 0,934), ao passo que divergência...

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“…On average and assuming a d 15 N progressive enrichment of 3.0 % with each trophic transfer (McCutchan et al 2003), the dusky flycatchers and some least flycatchers fed two to three trophic levels above the warbler species, particularly the yellow-rumped warbler at their respective regions of feather growth. Differences in diet between warbler and flycatcher species have been reported (Yard et al 2004). Hobson et al (1999) suggested that passerine birds inhabiting agricultural environments had greater d 15 N values than those from temperate forests.…”

Section: Discussionmentioning

confidence: 99%

Organochlorine Pollutants and Stable Isotopes in Resident and Migrant Passerine Birds from Northwest Michoacán, Mexico

Mora

2008

Arch Environ Contam Toxicol

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Although concentrations of organochlorine compounds (OCs) in birds from most of the United States and Canada have decreased over the last 30 years, there is still concern that migrant birds might be exposed to elevated concentrations of OCs during migration in Latin America. The Lerma-Chapala Basin in west-central Mexico is an important migration corridor and wintering area for many species. The objectives of this study were to assess if resident and migrant birds wintering in western Michoacán, Mexico accumulated elevated concentrations of OCs during fall and spring and to determine if the stable isotopes d 15 N, d 13 C, and dD could be used to predict burdens and origins of DDE accumulation. Resident and migrant passerine insectivorous birds were collected during fall and spring (2001)(2002) in northwest Michoacán, near Chapala Lake, Mexico. The carcasses were analyzed for OCs and tail feathers were analyzed for stable isotopes d 15 N, d 13 C, and dD. The OCs detected in more than 50% of the samples were: oxychlordane (79%), p,p'-DDE (100%), p,p 0 -DDT (57%), and total PCBs (100%). p,p 0 -DDE was the OC detected at the highest concentrations, whereas residues of other OCs were near or below detection limits. Overall, there were no significant differences in concentrations of OCs between seasons or between resident and migrant birds. Concentrations of DDE and oxychlordane were somewhat higher in migrant and resident birds during spring than in fall; however, concentrations were significantly different only for oxychlordane. Two resident birds collected in fall and spring had DDE residues [10 lg/g wet weight in carcass. There were no significant differences in d 13 C and d 15 N values among species, between seasons, or between migrant and resident birds. However, dD values were clearly different between species and helped differentiate migrant from resident birds. dD values also were negatively and significantly correlated with DDE concentrations in carcass. Birds with more depleted dD values in feathers tended to have higher DDE concentrations than those with less depleted dD values, suggesting a potential latitudinal accumulation of DDE. Overall, our results suggest that during fall and spring, there is not a significant buildup of persistent OCs in migrant and resident passerine insectivorous birds in northwest Michoacán, Mexico.

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Diets of Insectivorous Birds Along the Colorado River in Grand Canyon, Arizona

Cited by 45 publications

References 24 publications

Diet of three insectivorous birds in Nagapattinam District, Tamil Nadu, India – a preliminary study

Diet of three insectivorous birds in Nagapattinam District, Tamil Nadu, India – a preliminary study

Feeding resource partitioning between two understorey insectivorous birds in a fragment of Neotropical cloud forest

Organochlorine Pollutants and Stable Isotopes in Resident and Migrant Passerine Birds from Northwest Michoacán, Mexico

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