Answers to the photo quiz
Photo A: A classic banded kokopu community stream: small, bush-covered, low elevation with pool habitat. A few redfin bullies and shortfin eels were also present.
Photo B: Shortfin eel, but if you guessed inanga you were not far off. Because the site is in Northland, this type of habitat is more likely to contain a shortfin eel community than inanga. Also present were Crans bully, with a few longfin eels and redfin bullies.
Photo C: Torrentfish. This open, gravel riffle close to the sea is classic torrentfish habitat. Bluegill bullies also prefer this type of habitat and they were abundant at this site. Other species included common and upland bullies, longfin and shortfin eels (especially small ones), Canterbury galaxias and a few black flounders.
Photo D: Rainbow trout. This should have been easy... the large waterfall downstream means that diadromous species cannot reach this site, thus eliminating all those communities from contention. The site location (central North Island) and source (a large lake) were also dead giveaways.