"It sits in the stomach and they can't digest it".
Forest and Bird's concerned moves to fast-track major building projects could put birds like the pūteketeke in peril.
Without action, DoC warns there could be a 95 percent population decline in the next few decades.
Seagrass meadows absorb a huge amount of carbon dioxide but are declining at an alarming rate around the world.
The Department of Conservation has received reports of dead fish, including tuna, in the Whanganui River catchment.
The survey is part of a Department of Conservation project to explore, map and protect reefs.
"We estimate up to 250 visitors per day have been using the track."
Fisheries Minister hopes to halt exploding kina populations in Northland.
"They're probably roosting in all sorts of places."