In the 3 months that Pokemon Go has been out, I have found various sites in the neighbourhood where certain rare Pokemon do pop up at every now and then. Recently I had noticed Exeggcute appearing at the same place consistently. Hence I decided to note when it was appearing, so I could understand how best to predict for the future as well.
The Pokemon Nest where I was finding the Exeggcute recently, was also the Nest where I had caught Eevee, Oddish, Rhyhorn, Bulbasaur and Bellsprout in the past. As it is within walking distance from where I live, this is one of the few sites I tend to walk to if I notice an interesting Pokemon nearby. We start with Thursday and Friday 27th and 28th October 2016. Below are screen grabs of the Journal, which records an accurate time when the Pokemon were caught.
On Saturday 29th October 2016, the Exeggcute only appeared at 6:40am and 7:40am and none since until 6:40pm and 7:40pm. So perhaps this means that the spawning of Pokemon at this Nest Is coming to an end. This is disappointing, as at present with the doubling of candy received (Halloween promotion) each Exeggcute caught would result in a total of 8 Exeggcute candy (including the two candy for transferring to the Professor i.e. an Exeggcute can be evolved to Exeggcutor for every 7 caught. My daughter and I managed to catch enough to evolve 3 Exeggcutors, which are great to put onto gyms.
I managed to catch Exeggcute from that Pokemon Nest every hour on 28/10/16 between 6:40am to 10:40am (5 x Exeggcutes), and also a few on 27/10/16 and 29/10/16; I had been catching Exeggcute most of the week, but sadly I did not think about noting down how often and at what time they appeared until late in the week. But at least I have noted a certain pattern for the Pokemon appearing at this Nest which hopefully will help me in catching rare Pokemon in the future in the neighbourhood.
Fingers crossed that some other rare Pokemon will start appearing at that Pokemon Nest soon (e.g. Dratini, Rapidash, Charmander).