Guangzhou Association of Excavator Sales

  • Cavity Nesters: Birds that Use Holes in Trees - Donna L. Long

    Feb 10, 2018 · Female Hairy Woodpecker Picoides villosus) at nest cavity Do-It-Yourselfers: Birds that Excavate Their Own Cavity Nests. Woodpeckers are the primary excavators of nest holes. Where the Northern Flicker is the primary nest cavity excavators, the Flicker's nest holes provide homes to over thirteen species of mammal and bird species.

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  • The Pileated Woodpecker as a Keystone

    The Pileated Woodpecker as a Keystone Species—Aubry and Raley 260 USDA Forest Service Gen. Tech. Rep. PSW-GTR-181. 2002. Table 1—Bird and mammal species known to use cavities, entrance holes, or foraging holes excavated by pileated woodpeckers in coniferous forests of the western U.S. and Canada.

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  • CSIRO PUBLISHING | Wildlife Research

    The importance of excavators in hole nesting communities: availability and use of natural tree holes in old and mixed forests of western Canada. Journal of Ornithology, 148 (Suppl. 2): 425-434. Mahony, N.A., P.G. Krannitz, and K. Martin. (2006). Seasonal fecundity of sagebrush Brewer's sparrows at the northern edge of the range. The Auk, 123:512-523.

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  • (PDF) Woodpeckers, decay, and the future of cavity …

    The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada. Journal fur Ornithologie 148(Suppl. 2), 425–434. | Crossref | GoogleScholar Google Scholar | Ardia, D. R., Perez, J. H., and Clotfelter, E. D. (2006). Nest box orientation affects internal temperature

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  • Kathy Martin | Faculty Member Profile | UBC Forestry

    excavators can be useful as indicator species for forest bird diversity and forest health (Mikusiński et al., 2001; Drever, Aitken, Norris, & Martin, 2008). Studies of cavity nesters can help us understand inter-actions within bird communities and may aid in forest management by means of improved knowledge of species requirements (e.g., retention

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  • Receivers matter: the meaning of alarm calls and

    The importance of excavators in hole-nesting communities: Availability and use of natural tree holes in old mixed forests of western Canada

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  • Sustaining Cavity-Using Species: Patterns of Cavity Use

    K. E. H. Aitken and K. Martin, "The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada," Journal of Ornithology, vol. 148, supplement 2, pp. S425–S434, 2007.

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  • Digging for clues: Stick tools used for honey digging in a

    The man on the left used his panga to chop vertically into the soil at the hole previously excavated by chimpanzees (indicated by white arrow); he removed the loosened earth with his hands and piled it at the side of the nest; (b–d): An adult female chimpanzee at the excavated nest site on 23 November 2018; she first stood looking at the hole

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  • Exploring nest webs in more detail to improve forest

    Bird species in this nest-web included four woodpecker species, whose cavities were scarcely (9%) used by non-excavator birds, such as parrots, owls, and woodcreepers. Based on the Importance and Strength indices the most important tree species were Calycophyllum multiflorum (Rubiaceae) and Anadenanthera colubrina (Fabaceae).

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  • WOODPECKERS OF THE PACIFIC NORTHWEST: THEIR …

    however pairs frequently nest in very close proximity. Woodpeckers mainly defend the nest site rather than a foraging territory. All woodpeckers can excavate a nest hole. Reproduction requires from two to three months from start of excavation until the offspring are independent. With few exceptions only one clutch is produced per year.

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  • Breeding strategies of hole-nesting passerines in northern

    few opportunities for excavation by hole-nesting birds. The first nest-boxes were introduced in 1957 (in 1957-62 8 boxes a year; Lind & Peiponen 1963). In this study, the number of boxes (entrance hole either 30 mm or 45 mm) was as follows: 30 mm 45 mm 1966 51 4 1967-68 101 4 1969 101 54 1970-81 100 70

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  • Evolutionary Determinants of Clutch Size in Cavity-Nesting

    Kathryn E. H. Aitken, Kathy Martin The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada, Journal of Ornithology 148, no.S2 S2 (Jul 2007): 425–434.

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  • CSIRO PUBLISHING | Emu

    Sep 24, 2012 · The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada. Journal of Ornithology 148, 425–434. | The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada.

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  • Three-toed Woodpecker cavities in trees: A keystone

    Apr 01, 2018 · The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada J. Ornithol., 148 ( 2007 ), pp. 425 - …

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  • Response of woodpeckers to changes in forest health and

    Feb 01, 2010 · The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada Aitken Journal of Ornithology, (Suppl. 2):S425- 2007

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  • Avian Conservation and Ecology: Origin and Availability of

    The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada. Journal of Ornithology 148:S425-S434. Angelstam, P. K. 1998. Maintaining and restoring biodiversity in European boreal forests by developing natural disturbance regimes. Journal of Vegetation Science 9:593

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  • Woodpeckers as a keystone species - Nature Calgary

    Aug 03, 2007 · Cavity excavation follows the courtship ritual and pair bonding of most woodpeckers, which is why the strong cavity excavators rarely reuse nest holes from previous years or use nest boxes. Each woodpecker species constructs a slightly different style of nesting cavity in terms of the size of the cavity, diameter of the entrance hole and

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  • Nest habitat selection by the Austral parakeet in north

    Apr 01, 2013 · The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada. Aitken

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  • CSIRO PUBLISHING | Wildlife Research

    The importance of excavators in hole-nesting communities: availability and use of natural tree holes in old mixed forests of western Canada. Journal fur Ornithologie 148(Suppl. 2), 425–434. | Crossref | GoogleScholar Google Scholar | Ardia, D. R., Perez, J. H., and Clotfelter, E. D. (2006). Nest box orientation affects internal temperature

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  • Global relationships between tree-cavity excavators and

    Jul 08, 2020 · Excavators often use large, live or decaying trees, or coarse woody debris, for nesting, roosting and foraging, and the availability of large amounts of dead wood is found to be important for their long-term persistence in a given area [27–30].

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