Upper Midwest Environmental Sciences Center
Evaluation of an extendable pole-net to collect heron eggs in the canopy of tall trees
Hines, R. K., and Custer, T. W., 1995, Evaluation of an extendable pole-net to collect heron eggs in the canopy of tall trees: Colonial Waterbirds, v. 18, no. 1, p.120-122.
A pole, extendable from 2 to 8 m, with a nylon-mesh collecting net, was used to retrieve eggs from nests of Great Blue Herons (Ardea herodias) in the canopy of floodplain forests. A total of 200 eggs was collected for contaminant analysis from ten colonies along the upper Mississippi River during the spring of 1993. Low egg breakage (1%) and acceptable survival of embryos in an incubator to pipping (55%) indicated that the device was useful.
Keywords: Ardea herodias, eggs, catching-methods, USA,-Upper-Mississippi-R., bird-eggs, aquatic-birds, collecting- devices, USA,-Mississippi-R.