Sharp-shinned Hawk

Sharp-shinned Hawk
Sharp-shinned Hawk, by Steve Thornhill

Tuesday, April 26, 2011

Prothonotary Warblers at Northwest River








Guest Blogger Shirley Devan back with an update on the nest boxes at Northwest River Park in Chesapeake. April 25 Brian Taber [President of CVWO and boat driver in above photo], Jan Lockwood [Williamsburg Bird Club member wearing the WBC hat], and I checked 58 nest boxes by motorized canoe – 39 boxes that have been in place for three years and 19 new boxes installed in mid-March.


Carolina Chickadees are early breeders and we found 9 CACH nests, most with eggs and two boxes with nestlings. April 25 was the birthday for one clutch of 5 and the other box had 4 nestlings 4 days old.


Twenty-four of the older boxes showed evidence of Prothonotary Warbler nest building – everything from 1” of moss to a complete nest with three eggs! Another nest had one egg. The eggs are creamy white with dark brown speckles. The nests are a combination of moss and cypress twigs, usually 2-3 inches of each with the cypress twigs on the top layer. We observed one PROW female approach a box with nesting material and another flew out of a box as we approached. Incidentally we observed a good size watersnake curled up on a limb nearby!


New boxes installed in mid-March are not seeing much activity – except from wasps. We did hear PROW singing near these boxes, but not in the quantity we observed in the area of the established boxes where we heard or saw a PROW near almost every box. We’ll see what happens to these new boxes as the nesting season progresses.