Another Buttertubs walk

We find with our bad knee and hip (not both in one body) that Buttertubs Marsh is a perfect walk for us.  Distance is 2 km.  It is a loop trail.  There are songbirds.  AND - this time there was a biology lesson (extra photos).  While being careful not to disturb her, we did quietly suggest that there was a prepared patch of soft sand about 3 metres beyond where digging would be easier and her eggs would be a tad further off the trail behind a railing.  Our grandbaby expresses her interest in things (people, animals, birds) by pointing.  She was quite fascinated.