Or if you are an astronomer, then your science is Sirius. If you are a geologist, then your science is pretty gneiss. Don’t take science for granite.
I have been tracking Wall Lizards now for a while – and I am sure my wife will say lizard tracking has become an obsession – a serious obsession. I look at rock walls as we drive around town. I look for lizards on our weekend hikes. I watch for lacertids when I walk our daughter too and from school. Science is serious.
I have been watching the range expansion of two nicely segregated populations of lizards in Victoria – one population is about 0.63 km SSW from our house west of Hillside Mall, and the other is about 0.24 km north of us near Doncaster School – not that I have measured.
Each year I walk the perimeter of these populations to get an idea how fast lizards disperse in urban environments – again – this is serious science. Stop laughing. I can hear you laughing. Rolling your eyes does not help.
Wall Lizards seem to spread 40 to 100 meters – and it is the young ones that do the dispersing. Why? They race off to new habitat to avoid the cannibalistic tendencies of their parents. Parents with a 40 year old trekkie in the basement may want to consider this option as an incentive to get kids to move out.
Young lizards head for the relative safety of boring lawns – garden areas with lots of structure are occupied by hungry adults. Homeowners sometimes claim their lawn is crawling with young lizards in August – when all the summer’s eggs have hatched. In contrast, adults are relatively sedentary – once they find good sunny, rocky (complex) territory, they tend to move very little from year to year.
Now imagine my surprise when I walked up my driveway last night (May 23rd, 2018) and heard the characteristic rustling sound of a lizard in our food forest (yes, the lawn is gone and we have a food forest – the entire front garden is devoted to plants we can eat, and plants that attract bees to pollinate the plants with edible bits – but I digress). The lizard I found is at least 0.24 km from the nearest known population of lizards in my neighbourhood, and is an adult – with a perfect tail too – must have lived a charmed life free of bird and domestic cat attacks. Did this adult go walkabout? I doubt it.
The new colonist in the food forest at UF1510 (yes, as sci-fi nuts we gave our place a code name Urban Farm1510)…
Furthermore, the lizards nearest to my house are not brightly coloured – in fact they are kind of drab as far as Wall Lizards go. But our new lizard is gorgeous – more like ones from Triangle Mountain or farther north on the Saanich Peninsula.
This male is from Durrance Road – far more colourful than the ones near Doncaster School or Hillside Mall.
Is this a case of seriously good science prank? Was this a drive-by lizarding? Did a neighbour just buy some new garden supplies and a stow-away lizard emerged to find utopia in our food forest? I may never know.
My daughter has named the lizard Zoom. I guess he is there to stay.