Olive-sided Flycatcher
Summary of Coniferous
Forest Bird Conservation Plan - derived from species account author and
6/23/00 meeting.
by:
Paul Brandy
A.
Status
1.BBS
– Decreasing significantly nationally 2.5 - 3%, more significant in West
(highly significant).Western decrease = 4.1%. Recent declines (last 10
years) in Sierra Nevada signficant from BBS.
B. Habitat Needs
1.Positive
association with old growth (structurally diverse canopy layers).
2.Post
fire habitat, epsecially high intensity (but also low intensity).
3.Positive
association with clear cuts and thinning (abundance).
4.Present
in 0-20 year age stands. Between 20 to multi-layer stage not present, then
they return.
5.Natural
openings, blow downs, land slides.
6.Territory/home
range requirements: Positive association with increased snag density and
snag DBH.
7.Positive
association with residual timber. Move into area after clear cut.
8.Juxtaposition
of seral stages.
9.Decreasedproductivity
(almost significant) with managed timber areas compared to fire (probably
due to predation – corvids?).
C. Concerns
1. Low
productivity (lowest of any passerine in N. America?)
2. Disparity
between productivity in managed timber lands vs. fire – managed timber
might be sink.
3.Habitat
loss in general. Shift to younger seral stage (old growth being replaced
by clear cuts).
4.Loss
of habitat on wintering ground, especially for California populations.
5.Loss
of natural disturbance.
6.Possible
pesticide effects (spraying after clearcut to control weeds).
7.Too
much post fire salvage-logging reduces habitat utility.
D. Objectives
1.Reverse
declines.
2.Increase
reproductive success in managed forest.
E.
Action Items
1.Determine
optimal habitat requirements for productivity (old growth vs. logged vs.
burned vs. natural disturbance). Determine why not productive in managed
forests.
2.Determine
over-winter survivorship.
3.Determine
winter range.
4.Determine
impact of post-clearcut pesticide use, pesticides in general
5.Allow
fires
6.Reduce
post-fire salvage logging.
7.Protected
or acquired old growth should include old growth types suitable for OSFL
(natural openings, semi-open, multi-storied canopy, S. facing slopes, exposed
rocks) – not just closed canopy (which might be fine for BRCR and PIWO).
8.Determine
factors limiting or affecting prey sources.