BIOL 4250 Lecture Notes - Understory, Species Richness, Breeding Bird Survey
27 Jan 2013
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Document Summary
Good at detecting changes in abundance of highly vocal/visible birds (e. g. bobolink). Each route is surveyed one morning per year, in early june, with 50 stops of 3 min each. Experienced birders count all birds heard and seen. However, few surveys done in northern canada: breeding bird atlas intensive 5 year survey of individual 10kmx10km squares, with coverage of the entire province/state. Records presence/absence within the square and, on the most recent atlas, includes point counts to record abundance. Volunteers must document search effort, but there is no maximum limit to the time they can spend searching their square. Each station keeps track of netting effort ( net-hours ) each day, and conducts a census on site for birds that may not be caught. Good at estimating relative abundance of species that breed too far north to be surveyed with other methods, and is good at detecting population declines/increases.
