Profile: David Spencer Muirhead
- Name:
- David Muirhead
- City:
- Adelaide
- State:
- SA
- Country::
- Australia
- Occupation:
- amateur enthusiast
Comments
- I'm looking at Phyllophryne scortea(local provenance) in all these images,I suspect strongly.
- PS:I mean Phil not Paul-sorry sir!
- What a brilliant,sharp as sharp can be,image this is:Paul,I'm in awe!!
- This is a biggish juvenile or at most a subadult,by the way.
- I'm so far unable to find any references to the existence or otherwise,nor written clarification as to what if anything is known about sexual dimorphism in our Clinids(including breeding season gender-dependent transient changes of colouring and patterns of markings such as stripes,bands,blotches)in any of our mainstream fish ID books and also on this ausmus site:If such sexual dimorphism for Clinids has indeed been reported and documented in the literature,then I'd love to read about it,and if it's never even been considered as a possibility in this very poorly researched group(...which as a rank amateur I'd still find surprising-but then if we never ask the obvious questions?!...)then I wish to flag the certainty that,again based on field obs only,it does exist in at least one species:Heteroclinus perspicillatus.I've images of adult pairs in very proximate,almost intimate bonding poses w each ptner bowed head to tail side by side,and the sexual dichromism is very overt.
- I'm pretty certain,just from many multiseasonal field observations over recent years mainly at Carrickalinga on Fleurieu Peninsula just south of Adelaide,that the described NSW inshore species Heteroclinus whiteleggi is simply the transient (weeks or at most a few months each late spring/early summer) season dependent male phenotype of Heteroclinus perspicillatus. Note these 2 species' known ranges are disjunct or have minimal overlap,and any supposed separation by habitat preference can be explained by differing inshore wave energy in SA's gulfs vs NSWs' more exposed coasts. Please advise us of seasons/dates of the posted more overtly banded H whiteleggi images to prove I'm wrong!
- As per my earlier comment today but I failed to submit image and now wish another try!
- I'll now try sending an image of a male common brown butterfly taken in my garden at Normanville SA last week,purely as evidence to confirm my initial comment (and in the knowledge I don't have to prove anything here,it's been in various Butterflies of SA books since I was a child,but I like playing w my camera anyway and always glad to be of assistance to ausmus' team and interested public!)
- Slender WW are very common in SA's gulfs(indeed even commoner but much less noticeable than the also very common and similar sized pencil WW) and are easily found year-round at very shallow depths,even under 1 metre at times when searching grassy coastal embayments w snorkel or SCUBA (I see many more slenders at such very shallow sites than pencils,it's worth stating here):so the correct stated usual depth range should roughly match that given by ausmus for the pencil WW ie 1m to 20 m approx.
- Also is a very common butterfly in SA,(as I'd already pointed out some months ago!)particularly throughout the Mount Lofty Ranges but much more widespread coastally and subcoastally also.
