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![Gray Hairstreak (Strymon melinus) by Bryan Pfeiffer](https://bryanpfeiffer.com/wp-content/uploads/2018/11/strymon-melinus-1600x700-1600x700.jpg)
The Lepidoptera Library
Resources for Butterfly Identification and Appreciation
Treat yourself to some reading from Bryan’s library of resources for beginning and advancing butterflyers. Here (so far) you’ll find advice on tiger swallowtails and azures. Coming soon will be help with the Northeastern crescents in the genus Phyciodes.
![Canadian Tiger Swallowtail (Papilio canadensis) by Bryan Pfeiffer](https://bryanpfeiffer.com/wp-content/uploads/2019/06/papilio-canadensis-ferdinand-vt-22may2012-550x380.jpg)
Taming the Tigers
Identification advice for Canadian Tiger Swallowtail, Eastern Tiger Swallowtail and their hybrids here in the Northeast.
![Various azures in the genus Celastrina](https://bryanpfeiffer.com/wp-content/uploads/2018/04/celastrina-layberry-schmidt-550x380.jpg)
Getting the Blues
Bryan's explainer on what's new with those small blue butterflies that too many people incorrectly call Spring Azure.
![Phyciodes](https://bryanpfeiffer.com/wp-content/uploads/2018/12/phyciodes-cocyta-vt-13jun2018-550x380.jpg)
Cracking the Crescents
Coming soon: Bryan's explainer on how to cope with crescents — either northern or pearl.